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BL-STAT-2112-LEC-1922S STATISTICS AND PROBABILITY Dashboard My courses BL-STAT-2112-LEC-1922S Week 19: Linear Relationships Long Quiz 4 Started on State Completed on Time taken Grade Saturday, 8 February 2020, 4:18 PM Finished Saturday, 8 February 2020, 4:23 PM 4 mins 41 secs 17.00 out of 20.00 (85%) Question 1 Correct Mark 1.00 out of 1.00 Flag question Question text Describe the relationship based when r value = 0.63 Select one: a. Minimal positive correction b. Weak positive correction c. No apparent correlation d. Strong positive correction Question 2 Correct Mark 1.00 out of 1.00 Flag question Question text Given the equation 9y = 2x + 81, what is the y intercept? Answer: 9 Question 3 Correct Mark 1.00 out of 1.00 Flag question Question text Bivariate is defined as the analysis of a single variable. Select one: a. FALSE b. TRUE Question 4 Correct Mark 1.00 out of 1.00 Flag question Question text A businessman is increasing his price for processed food, claiming that the cost of labor and material is going up and accounts for 75% of his budget. In a random sample of 10 of the processed food, it is found out that in 6 of the processed food, the cost of the material is higher. What is the standard error of the proportion? Select one: a. 0.442 b. 0.137 c. 0.391 d. 0.296 Question 5 Incorrect Mark 0.00 out of 1.00 Flag question Question text Given the equation y = 7x+ 30, what is the slope? Answer: 4.2 Question 6 Correct Mark 1.00 out of 1.00 Flag question Question text Given the data below, what is the direction of the association between the two variables. Select one: a. None of the choices b. Positive linear association c. Negative linear association d. Weak linear association e. Strong linear association Question 7 Correct Mark 1.00 out of 1.00 Flag question Question text Write the slope-intercept equation of the line that has slope 6 and y-intercept 4. Select one: a. 6x b. y c. 4x d. 6x+4 e. 4y f. 4x+6 g. 6y h. y Question 8 Correct Mark 1.00 out of 1.00 Flag question Question text The equation y=mx + b is also known as Select one: a. correlation intercept form b. xy intercept form c. slope intercept form d. y intercept Question 9 Incorrect Mark 0.00 out of 1.00 Flag question Question text The graph below describes a ______________________ correlation. Select one: a. Inverse Correlation b. Perfect Positive Correlation c. Perfect Negative Correlation d. Downline Correlation Feedback Your answer is incorrect. Question 10 Correct Mark 1.00 out of 1.00 Flag question Question text Linear correlation coefficient is always a value between ____ and ____. Select one: a. 1, 100 b. 0, 100 c. +1, -1 d. 0, 1 Question 11 Incorrect Mark 0.00 out of 1.00 Flag question Question text Given the following data, compute for the correlation coefficient. Round your answer into 2 decimal places. If the answer is a whole number, do not put a decimal after it. Answer: 1 to 1. Question 12 Correct Mark 1.00 out of 1.00 Flag question Question text If the line has no slope, Select one: a. The line lies at the x axis b. The line intercepts the x and y axis c. The line is a horizontal line d. The line is at the point of origin Question 13 Correct Mark 1.00 out of 1.00 Flag question Question text The equation y=mx + b is also known as Select one: a. y intercept b. correlation intercept form c. xy intercept form d. slope intercept form Question 14 Correct Mark 1.00 out of 1.00 Flag question Question text The traffic management office claims that 65% of road accidents are related to motorcycles. In a random sample of 200 accidents, it is found that 135 of the accidents are related to motorcycles. What is the standard error of the proportion? Select one: a. 0.077 b. 0.034 c. 0.045 d. 0.062 Question 15 Correct Mark 1.00 out of 1.00 Flag question Question text A building contractor/engineer is increasing his price for building projects, claiming that the cost of labor and material is going up and accounts for 65% of his budget. In a random sample of 30 of his projects it is found that in 20 of the projects the cost of the material is higher. At the 5% level of significance, test the contractor/engineer’s claim. Based on the test, what can you conclude? Select one: a. Accept the null hypothesis b. Reject the null hypothesis Question 16 Correct Mark 1.00 out of 1.00 Flag question Question text Which of the following is INCORRECT about correlation coefficient. Select one: a. correlation coefficient can be negative or positive b. correlation coefficient is the number that quantifies two aspects of relationship between the data c. correlation coefficient can never be a zero value d. when correlation coefficient is equal to 1, then the data is perfectly linear Question Correct 17 Mark 1.00 out of 1.00 Flag question Question text When examining scatterplot and draw an ellipse around the data, long and narrow ellipses means Select one: a. Cannot determine with the given information b. Weak linear association c. Strong linear association d. Positive linear association e. Negative linear association Question 18 Correct Mark 1.00 out of 1.00 Flag question Question text The variable that causes an effect Select one: a. Explanatory variable b. Response variable c. Trend variable d. Correlation variable Question 19 Correct Mark 1.00 out of 1.00 Flag question Question text Describe the relationship based when r value = 0.01 Select one: a. Weak positive correction b. Minimal positive correction c. Strong positive correction d. No apparent correlation Question 20 Correct Mark 1.00 out of 1.00 Flag question Question text The value of a perfect positive coefficient is ________. Select one: a. None of the choices b. A positive number greater than 0. c. Equal to 1. d. Equal to zero. e. A positive number greater than 1 BL-STAT-2112-LEC-1922S STATISTICS AND PROBABILITY Dashboard My courses BL-STAT-2112-LEC-1922S Week 17: Displaying Bivariate Data Learning Activity 4 Started on State Completed on Time taken Grade Saturday, 8 February 2020, 4:16 PM Finished Saturday, 8 February 2020, 4:18 PM 1 min 39 secs 8.00 out of 10.00 (80%) Question 1 Correct Mark 1.00 out of 1.00 Flag question Question text A Police Sub Station claims that 45% of crimes are related to cell phone snatching. In a random sample of 150 accidents, it is found that 60 of the accidents are related to cell phone snatching. What is the test statistic for this scenario? Select one: a. -1.231 b. -0.066 c. 2.112 d. 1.992 Question 2 Correct Mark 1.00 out of 1.00 Flag question Question text About 30% of the male population living in an urban area smokes cigarette. A researcher believes that male aged 16-30 are more likely smokes cigarette than other ages in the urban area population. The researcher surveys 300 male aged 16-30 and finds that 80 of them smokes cigarette: What is the standard error of the proportion? Select one: a. 0.026 b. 0.089 c. 0.041 d. 0.011 Question 3 Incorrect Mark 0.00 out of 1.00 Flag question Question text Given the data, what is the strength of the association between the two variables. Select one: a. None of the choices b. Positive linear association c. Strong linear association d. Weak linear association e. Negative linear association f. All of the choices Question 4 Correct Mark 1.00 out of 1.00 Flag question Question text The traffic management office claims that 65% of road accidents are related to motorcycles. In a random sample of 200 accidents, it is found that 135 of the accidents are related to motorcycles. What is the test statistic for this scenario? Select one: a. 0.0808 b. 0.0548 c. 0.0741 d. 0.0993 Question 5 Correct Mark 1.00 out of 1.00 Flag question Question text The goal of examining bivariate data is to show some relativity or association between two or more variables. Select one: a. The statement is TRUE. b. The statement is FALSE. Question 6 Correct Mark 1.00 out of 1.00 Flag question Question text In a ____________, high values in one variable correspond to high values in the other variable. Select one: a. Perfect Correlation b. Positive Correlation c. Scattered Correlation d. Negative Correlation Question 7 Correct Mark 1.00 out of 1.00 Flag question Question text This measures relationship between bivariate data. Select one: a. Linear Regression b. None of the choices c. Correlation d. All of the choices e. Scatterplot Analysis Question 8 Correct Mark 1.00 out of 1.00 Flag question Question text The traffic management office claims that 65% of road accidents are related to motorcycles. In a random sample of 200 accidents, it is found that 135 of the accidents are related to motorcycles. What is the observed value of the sample proportion? Select one: a. 0.822 b. 0.675 c. 0.963 d. 0.367 Question 9 Correct Mark 1.00 out of 1.00 Flag question Question text A building contractor/engineer is increasing his price for building projects, claiming that the cost of labor and material is going up and accounts for 65% of his budget. In a random sample of 30 of his projects it is found that in 20 of the projects the cost of the material is higher. At the 5% level of significance, test the contractor/engineer’s claim. Based on the test, what can you conclude? Select one: a. Accept the null hypothesis b. Reject the null hypothesis Question 10 Incorrect Mark 0.00 out of 1.00 Flag question Question text A Police Sub Station claims that 45% of crimes are related to cell phone snatching. In a random sample of 150 accidents, it is found that 60 of the accidents are related to cell phone snatching. What is the standard error of the proportion? Select one: a. 0.041 b. 0.066 c. 0.033 d. 0.028 BL-STAT-2112-LEC-1922S STATISTICS AND PROBABILITY Dashboard My courses BL-STAT-2112-LEC-1922S Week 15: p-Values Long Quiz 3 Started on State Completed on Time taken Grade Saturday, 8 February 2020, 4:11 PM Finished Saturday, 8 February 2020, 4:15 PM 4 mins 11 secs 16.00 out of 20.00 (80%) Question 1 Incorrect Mark 0.00 out of 1.00 Flag question Question text Suppose that the z is the test statistics for hypothesis testing, calculate the value of the z for each of the following. Express your answer in 2 decimal places. µ = 77, σ = 6, n = 109, x̄ = 78.2 Answer: Question 2 12.83 Correct Mark 1.00 out of 1.00 Flag question Question text Find the sample size given 99% confidence, Margin of Error = 0.11 and ̂p = 0.35. Answer: 126 Question 3 Correct Mark 1.00 out of 1.00 Flag question Question text Margin of error is Select one: a. the quotient of confidence coefficient and square root of the sample size divided standard deviation b. the product of confidence coefficient and standard deviation divided by the square root of the sample size c. the quotient of confidence coefficient and standard deviation multiplied by the square root of the sample size d. the product of confidence coefficient and square root of the sample size divided by standard deviation Question 4 Incorrect Mark 0.00 out of 1.00 Flag question Question text Supposed that the z is the test statistics for hypothesis testing, calculate the value of the z for each of the following. Express your answer in 2 decimal places. µ = 8.5, σ = 4, n = 99, x̄ = 7.2 Answer: 34.32 Question 5 Incorrect Mark 0.00 out of 1.00 Flag question Question text William collected a random sample of 88 people, asking how many times they open ABC web site per day on average, and calculated x̄ = 50.30. ABC suggests that μ = 55, and s = 10. William thinks the actual mean is less than the website owner claims. What is the null and alternative hypothesis? Select one: a. Null hypothesis µ b. Null hypothesis µ ≥ 55, Alternative hypothesis µ < 55 c. Null hypothesis µ > 55, Alternative hypothesis µ ≤ 55 d. Null hypothesis µ ≠ 55, Alternative hypothesis µ e. 55 f. 55, Alternative hypothesis µ ≠ 55 Question 6 Correct Mark 1.00 out of 1.00 Flag question Question text As the confidence interval for a given statistics increases in length, the confidence level ___________. Select one: a. Equal to 1 b. Equal to zero c. Increases d. Decreases Question 7 Correct Mark 1.00 out of 1.00 Flag question Question text The formula given below will give an output of Select one: a. Margin of Error b. Confidence Interval for large samples c. Confidence Coefficient Limits d. Sample population mean Question 8 Correct Mark 1.00 out of 1.00 Flag question Question text Values supporting the ___________________ occurs in the rejection region. Select one: a. Critical values b. Null hypothesis c. Null hypothesis and critical values d. Alternative hypothesis and critical values e. Alternative hypothesis Question 9 Correct Mark 1.00 out of 1.00 Flag question Question text St. Therese senior high school have an average achievement test score of 900. From a random sample of 169 students St. Therese students we find the average achievement test score to be 850 with a standard deviation of 88. We want to know if these high school students are representative of the overall population: What can we conclude based on the hypotheses and test statistic? Select one: a. Accept null hypothesis b. Accept alternative hypothesis c. Reject alternative hypothesis d. Reject null hypothesis Question 10 Correct Mark 1.00 out of 1.00 Flag question Question text Given the formula in determining the minimum sample size needed when estimating the population proportion and if no approximation is known, what value of p̂ will be used? Select one: a. 1 b. 2 c. 0.5 d. 0 Question 11 Correct Mark 1.00 out of 1.00 Flag question Question text Given α=0.05 and the test statistics, decide whether the null hypothesis is to be rejected or accepted: 1.0 Select one: a. Cannot be determined b. Reject c. Do not Reject Question 12 Correct Mark 1.00 out of 1.00 Flag question Question text A type of test that is denoted by the symbol Ho. Select one: a. Rejection hypothesis b. Null hypothesis c. Statistical hypothesis d. Alternative hypothesis Question 13 Incorrect Mark 0.00 out of 1.00 Flag question Question text A survey was conducted from the 250 individuals. Based on the result of the survey, 170 are satisfied with the current Local Government administration. Estimate the sample proportion ̂p of those who are not satisfied based on the sample provided. Select one: a. 0.68 b. 55% c. 0.32 d. 0. Question 14 Correct Mark 1.00 out of 1.00 Flag question Question text Sampling distribution of proportions is randomly distributed. Select one: a. FALSE. Replace the word proportion with “p hat” b. FALSE. Replace the word Sampling distribution with Confidence Coefficient c. FALSE. Replace the word randomly with normally. d. TRUE Question 15 Correct Mark 1.00 out of 1.00 Flag question Question text The alternative hypothesis and null hypothesis should be ________________. Select one: a. Mutually exclusive b. None of the choices c. Mutually inclusive d. All of the choices Question 16 Correct Mark 1.00 out of 1.00 Flag question Question text Given α=0.05 and the test statistics, decide whether the null hypothesis is to be rejected or accepted: 1.20 Select one: a. Reject b. Do not Reject c. Cannot be determined Question 17 Correct Mark 1.00 out of 1.00 Flag question Question text Given α=0.05 and the test statistics, decide whether the null hypothesis is to be rejected or accepted: –4 Select one: a. Cannot be determined b. Do not Reject c. Reject Question 18 Correct Mark 1.00 out of 1.00 Flag question Question text Find the sample size given 90% confidence, Margin of Error = 0.05 and ̂p =0.30. Select one: a. 138 b. 301 c. 228 d. 198 Question 19 Correct Mark 1.00 out of 1.00 Flag question Question text King Lo Electronics claims that the new brand of computer will last for 25,000 hours. A research company conducted a test on the information. The company randomly select and test 100 cellular phone. The data from the sample shows that the mean life of the cellular phone is 20,000 hours, with a standard deviation of 1000 hours. Determine the 95% confidence interval of the mean life of the cellular phone. Select one: a. (19,804, 20,196) b. (17,482, 18,649) c. (23,467, 24,639) d. (26,928, 27,375) Question 20 Correct Mark 1.00 out of 1.00 Flag question Question text Determine whether each of the following is a null of an alternative hypothesis: The average internet usage of a College student is 6 hours. Answer: Null hypothesis BL-STAT-2112-LEC-1922S STATISTICS AND PROBABILITY Dashboard My courses BL-STAT-2112-LEC-1922S Week 13: Learning Activity Learning Activity 3 Started on State Completed on Time taken Grade Saturday, 8 February 2020, 4:09 PM Finished Saturday, 8 February 2020, 4:11 PM 1 min 30 secs 7.00 out of 10.00 (70%) Question 1 Correct Mark 1.00 out of 1.00 Flag question Question text A private organization telephone poll of 750 adults, aged 18 and older, living in the country found that 60% of citizen feel confident in the accuracy of their doctor's advice, and don't feel the need to check for a second opinion or do additional research. The margin of error for this survey was given as ± 20 percentage points. Find a 95% confidence interval estimate of the percent of adults who feel confident in the accuracy of their doctor’s advice and don’t feel the need to check for a second opinion. Select one: a. (0.452, 0.538) b. (0.565, 0.640) c. (0.316, 0.483) d. (0.490, 0.601) Question 2 Correct Mark 1.00 out of 1.00 Flag question Question text King Lo Electronics claims that the new brand of computer will last for 25,000 hours. A research company conducted a test on the information. The company randomly select and test 100 cellular phone. The data from the sample shows that the mean life of the cellular phone is 20,000 hours, with a standard deviation of 1000 hours. Determine the 95% confidence interval of the mean life of the cellular phone. Select one: a. (19,804, 20,196) b. (17,482, 18,649) c. (23,467, 24,639) d. (26,928, 27,375) Question 3 Correct Mark 1.00 out of 1.00 Flag question Question text Given n=20, x̄ =89, s=2, 99% confidence. Assuming that the samples come from a normal distribution, find the margin of error. Select one: a. 0.89 b. 1.15 c. 1.05 d. 0.93 Question 4 Incorrect Mark 0.00 out of 1.00 Flag question Question text Given the sample size (n=400) and sample proportion (p=0.56), find the approximate margin of error for the 99% confidence interval: Select one: a. 0.064 b. 0.043 c. 0.052 d. 0.074 Question 5 Incorrect Mark 0.00 out of 1.00 Flag question Question text Find the sample size given 90% confidence, Margin of Error = 0.15 and ̂p =0.25. Select one: a. 21 b. 22 c. 20 d. 23 Question 6 Incorrect Mark 0.00 out of 1.00 Flag question Question text Identify the following formula: zα2(σn−−√)zα2(σn) Select one: a. Population Proportion b. Sample Proportion c. Margin of Error d. Point Estimate Question 7 Correct Mark 1.00 out of 1.00 Flag question Question text A survey of 200 people finds that they work on average of 8 hours a day. If the margin of error at 98% confidence level is 1.2 hours. How do you compute for the lower confidence interval? Select one: a. Z score plus less the square root of 8 hours less 1.2 hours b. None of the choices c. 8 hours less 1.2 hours multiplied by the z score at 98% confidence level d. 8 hours less 1.2 hours Question 8 Correct Mark 1.00 out of 1.00 Flag question Question text A survey of 900 people finds that they work on average of 9 hours a day. If the margin of error at 98% confidence level is 1.5 hours. What is the solution to find the lower confidence interval? Select one: a. All of the choices b. Z score plus less the square root of 9 hours less 1.5 hours c. None of the choices d. 9 hours less 1.5 hours multiplied by the z score at 98% confidence level e. 9 hours less 1.5 hours Question 9 Correct Mark 1.00 out of 1.00 Flag question Question text What is in the center of the confidence interval? Select one: a. Population Parameter b. Margin of Error c. Point Estimate d. Number of samples Question 10 Correct Mark 1.00 out of 1.00 Flag question Question text When the confidence level is 95%, the ____________________ are +- 1.96 Select one: a. Confidence coefficients b. “p hat” values c. Margin of Errors d. Confidence intervals BL-STAT-2112-LEC-1922S STATISTICS AND PROBABILITY Dashboard My courses BL-STAT-2112-LEC-1922S Week 20: Quarterly Exam Second Quarter Exam Started on State Completed on Time taken Marks Grade Saturday, 8 February 2020, 3:59 PM Finished Saturday, 8 February 2020, 4:09 PM 9 mins 47 secs 44.00/50.00 8.80 out of 10.00 (88%) Question 1 Correct Mark 1.00 out of 1.00 Flag question Question text Point estimate is Select one: a. A statistical that estimates a population parameter b. Equal to the population mean c. Always equal to the number or samples d. A range of possible values for a population parameter. Question 2 Correct Mark 1.00 out of 1.00 Flag question Question text Values supporting the ___________________ occurs in the rejection region. Select one: a. Critical values b. Null hypothesis c. Alternative hypothesis and critical values d. Null hypothesis and critical values e. Alternative hypothesis Question 3 Correct Mark 1.00 out of 1.00 Flag question Question text St. Therese senior high school have an average achievement test score of 900. From a random sample of 169 students St. Therese students we find the average achievement test score to be 850 with a standard deviation of 88. We want to know if these high school students are representative of the overall population: What can we conclude based on the hypotheses and test statistic? Select one: a. Accept null hypothesis b. Accept alternative hypothesis c. Reject alternative hypothesis d. Reject null hypothesis Question 4 Correct Mark 1.00 out of 1.00 Flag question Question text A building contractor/engineer is increasing his price for building projects, claiming that the cost of labor and material is going up and accounts for 65% of his budget. In a random sample of 30 of his projects it is found that in 20 of the projects the cost of the material is higher. What is the standard error of the proportion? Select one: a. 0.032 b. 0.0632 c. 0.051 d. 0.087 Question 5 Correct Mark 1.00 out of 1.00 Flag question Question text Given n=10, x̄ =28, s=2.0, 95% confidence. Assuming that the samples come from a normal distribution, find the margin of error. Select one: a. 1.24 b. 26.76 c. 3.16 d. 0.63 Question 6 Correct Mark 1.00 out of 1.00 Flag question Question text Which of the following is INCORRECT about correlation coefficient. Select one: a. correlation coefficient can never be a zero value b. correlation coefficient is the number that quantifies two aspects of relationship between the data c. correlation coefficient can be negative or positive d. when correlation coefficient is equal to 1, then the data is perfectly linear Question 7 Correct Mark 1.00 out of 1.00 Flag question Question text The alternative hypothesis and null hypothesis should be ________________. Select one: a. None of the choices b. Mutually inclusive c. All of the choices d. Mutually exclusive Question 8 Correct Mark 1.00 out of 1.00 Flag question Question text The graph below describes a ______________________ correlation. Select one: a. Perfect Negative Correlation b. Inverse Correlation c. Perfect Positive Correlation d. Downline Correlation Feedback Your answer is correct. Question 9 Incorrect Mark 0.00 out of 1.00 Flag question Question text Consider the scenario: In a recent survey, 320 persons out of 35 reported that they prefer to ride in a public utility air-conditioned vehicle rather than a jeepney. What is the value of the test statistics? Select one: a. 3.49 b. – 1.33 c. – 1.85 d. – 1.85 Question 10 Correct Mark 1.00 out of 1.00 Flag question Question text Year is an example of a Select one: a. Trend variable b. Response variable c. Explanatory variable d. Correlation variable Question 11 Correct Mark 1.00 out of 1.00 Flag question Question text Given α=0.05 and the test statistics, decide whether the null hypothesis is to be rejected or accepted: – 0.6 Select one: a. Cannot be determined b. Do not Reject c. Reject Question 12 Correct Mark 1.00 out of 1.00 Flag question Question text Given the equation 3y = x+15, what is the y intercept? Answer: 5 Question 13 Correct Mark 1.00 out of 1.00 Flag question Question text The goal of examining bivariate data is to show some relativity or association between two or more variables. Select one: a. The statement is FALSE. b. The statement is TRUE. Question 14 Correct Mark 1.00 out of 1.00 Flag question Question text Given the equation 5y = 20x+ 30, what is the slope? Answer: Question Correct 4 15 Mark 1.00 out of 1.00 Flag question Question text Describe the relationship based when r value = 0.63 Select one: a. Strong positive correction b. Minimal positive correction c. No apparent correlation d. Weak positive correction Question 16 Correct Mark 1.00 out of 1.00 Flag question Question text Given α=0.05 and the test statistics, decide whether the null hypothesis is to be rejected or accepted: 3.31 Select one: a. Cannot be determined b. Do not Reject c. Reject Question 17 Correct Mark 1.00 out of 1.00 Flag question Question text A survey of 200 people finds that they work on average of 8 hours a day. If the margin of error at 98% confidence level is 1.2 hours. How do you compute for the lower confidence interval? Select one: a. Z score plus less the square root of 8 hours less 1.2 hours b. 8 hours less 1.2 hours multiplied by the z score at 98% confidence level c. None of the choices d. 8 hours less 1.2 hours Question 18 Correct Mark 1.00 out of 1.00 Flag question Question text In hypothesis testing, the computed statistics is compared to the critical value for decision making. Select one: a. The statement is TRUE. b. The statement is FALSE. Question 19 Incorrect Mark 0.00 out of 1.00 Flag question Question text The “p hat” is calculated as Select one: a. 1- (Number of desired elements over the number of desired outcomes) b. Number of desired outcomes over the number of desired elements c. (Number of desired outcomes over the number of desired elements) – 1 d. Number of desired elements over the number of desired outcomes Question 20 Incorrect Mark 0.00 out of 1.00 Flag question Question text Using the following data, find the lower bound of confidence interval. Your answer must be in 3 decimal places. n=400, p̂ = 0.75, 90% confidence Answer: 0.036 Question 21 Correct Mark 1.00 out of 1.00 Flag question Question text Given the table and graph, determine the slope intercept equation. Select one: a. y=5x + 1 b. y=5x + 2 c. y=10x + 2 d. y=10x + 1 Feedback Your answer is correct. Question 22 Correct Mark 1.00 out of 1.00 Flag question Question text In the slope-intercept equation of a line, the slope of the line is represented as the coefficient of the variable y. Select one: a. Cannot be determined b. TRUE c. FALSE Question 23 Correct Mark 1.00 out of 1.00 Flag question Question text A _____________ is simply a scatterplot in which we connect successive chronological observations with a line segment to give more information about how the data values are changing over a period of time. Select one: a. XY Plot b. Line plot c. Scatter Plot d. Correlation Plot Question 24 Correct Mark 1.00 out of 1.00 Flag question Question text What is the null hypothesis to the claim that people like android phone than IOS? State the null hypothesis. Select one: a. Less people like android and IOS phone b. More people like IOS phone than android phone c. More people like android than IOS phone d. Less people like IOS than android Question 25 Not answered Marked out of 1.00 Flag question Question text Given the following data, compute for the correlation coefficient. Round your answer into 2 decimal places. If the answer is a whole number, do not put a decimal after it. Answer: Question 26 Correct Mark 1.00 out of 1.00 Flag question Question text The “p hat” is calculated as Select one: a. 1- (Number of desired elements over the number of desired outcomes) b. Number of desired elements over the number of desired outcomes c. (Number of desired outcomes over the number of desired elements) – 1 d. Number of desired outcomes over the number of desired elements Question 27 Correct Mark 1.00 out of 1.00 Flag question Question text This measures relationship between bivariate data. Select one: a. None of the choices b. Correlation c. Linear Regression d. Scatterplot Analysis Question 28 Correct Mark 1.00 out of 1.00 Flag question Question text Sampling distribution of proportions is randomly distributed. Select one: a. FALSE. Replace the word randomly with normally. b. FALSE. Replace the word Sampling distribution with Confidence Coefficient c. TRUE d. FALSE. Replace the word proportion with “p hat” Question 29 Correct Mark 1.00 out of 1.00 Flag question Question text A type of test that is denoted by the symbol Ho. Select one: a. Alternative hypothesis b. Null hypothesis c. Rejection hypothesis d. Statistical hypothesis Question 30 Correct Mark 1.00 out of 1.00 Flag question Question text Given the equation 3y = 21x + 9, what is the slope? Answer: 7 Question 31 Correct Mark 1.00 out of 1.00 Flag question Question text This pattern is produced when the score of one observation is high, the score of the other observation to be high. Select one: a. Positive Correlation b. Direct Correlation c. XY Plot d. Negative Correlation Question 32 Correct Mark 1.00 out of 1.00 Flag question Question text In hypothesis testing, the computed statistics is compared to the critical value for decision making. Select one: a. The statement is FALSE. b. The statement is TRUE. Question 33 Correct Mark 1.00 out of 1.00 Flag question Question text Three characteristics of a bivariate are Select one: a. Dependent, independent & response variables b. X axes, Y axes & points c. Shape, direction and strength d. Points, line, XY axes Question 34 Correct Mark 1.00 out of 1.00 Flag question Question text Given α=0.05 and the test statistics, decide whether the null hypothesis is to be rejected or accepted: –4 Select one: a. Cannot be determined b. Do not Reject c. Reject Question 35 Correct Mark 1.00 out of 1.00 Flag question Question text Given the following data, find the margin of error. Your answer must be in two decimal places. Sample size = 100, Mean = 75, Standard Deviation = 20, 99% confidence Answer: 5.16 Question 36 Correct Mark 1.00 out of 1.00 Flag question Question text If the line has no slope, Select one: a. The line intercepts the x and y axis b. The line is a horizontal line c. The line lies at the x axis d. The line is at the point of origin Question 37 Correct Mark 1.00 out of 1.00 Flag question Question text Using the following data, find the lower bound of confidence interval. Your answer must be in 3 decimal places. n=700, p̂ = 0.75, 95% confidence Answer: 0.718 Question 38 Correct Mark 1.00 out of 1.00 Flag question Question text Given n=50, x̄ =250, s=4, 90% confidence. Assuming that the samples come from a normal distribution, find the interval estimate of the population mean. Select one: a. (263.08, 264.67) b. (244.71, 248.74) c. (248.35, 251.65) d. (249.07, 250.93) Question 39 Incorrect Mark 0.00 out of 1.00 Flag question Question text Using the following data, find the margin of error. Your answer must be in 3 decimal places. n=700, p̂ = 0.75, 95% confidence Answer: 0.780 Question 40 Correct Mark 1.00 out of 1.00 Flag question Question text Given α=0.05 and the test statistics, decide whether the null hypothesis is to be rejected or accepted: 2.35 Select one: a. Cannot be determined b. Reject c. Do not Reject Question 41 Incorrect Mark 0.00 out of 1.00 Flag question Question text Given the following data, find the margin of error. Your answer must be in two decimal places. Sample size = 100, Mean = 80, Standard Deviation = 20, Confidence coefficient = 1.645 Answer: 76.71 Question 42 Correct Mark 1.00 out of 1.00 Flag question Question text Year and household monthly water consumption in the Philippines Select one: a. Year is the explanatory variable and water consumption is the response variable b. Cannot be determined c. Water consumption is the explanatory variable and year is the response variable Question 43 Correct Mark 1.00 out of 1.00 Flag question Question text A businessman is increasing his price for processed food, claiming that the cost of labor and material is going up and accounts for 75% of his budget. In a random sample of 10 of the processed food, it is found out that in 6 of the processed food, the cost of the material is higher. What is the test statistic for this scenario? Select one: a. 0.899 b. 1.095 c. 1.203 d. 0.996 Question 44 Correct Mark 1.00 out of 1.00 Flag question Question text The data had a _________________ when one variable increases, the other variable also decreases. Select one: a. positive linear association b. proportional association c. elliptical association d. negative linear association Question 45 Correct Mark 1.00 out of 1.00 Flag question Question text Point estimate is Select one: a. Always equal to the number or samples b. A statistical that estimates a population parameter c. A range of possible values for a population parameter. d. Equal to the population mean Question 46 Correct Mark 1.00 out of 1.00 Flag question Question text This refers to the area where the value of the test statistic lies for which we will reject the null hypothesis. Select one: a. Critical region b. Null and Rejection region c. Rejection region d. Critical and Null region e. Null region f. All of the choices g. Rejection and Critical region h. None of the choices Question 47 Correct Mark 1.00 out of 1.00 Flag question Question text The Engineer of the building wants to use the proportion of the population to determine the sample size needed to interview regarding their idea about the new color design of the building. He wants to be able to assure with probability 0.90 that his error will be most 0.10. Similar surveys during past year that 85% approved the new color design. How large a sample does the Engineer need? Select one: a. 2,145 b. 1,372 c. 278 d. 196 Question 48 Correct Mark 1.00 out of 1.00 Flag question Question text Given the equation 9y = 2x + 81, what is the y intercept? Answer: 9 Question 49 Correct Mark 1.00 out of 1.00 Flag question Question text Given the sample size (n=250) and sample proportion (p=0.40), find the approximate margin of error for the 90% confidence interval: Select one: a. 0.05 b. 0.07 c. 0.03 d. 0.08 Question 50 Correct Mark 1.00 out of 1.00 Flag question Question text About 30% of the male population living in an urban area smokes cigarette. A researcher believes that male aged 16-30 are more likely smokes cigarette than other ages in the urban area population. The researcher surveys 300 male aged 16-30 and finds that 80 of them smokes cigarette: What is the observed value of the sample proportion? Select one: a. 0.419 b. 0.189 c. 0.372 d. 0.267