Homework for Mat 207
April 30 – EXAM ( yes it’s a Saturday!)
April 26 – Last day of class
April 21- Third test
April 19 – Honors Day - Class time is from 9:25 to 10:30
April 14 – Returned quiz and discussed hypothesis tests for standard deviation. Then I worked the quiz using only Pvalues. Homework: 1, 5 , 7, 9, 10, and 13. (Use the critical value method of hypothesis testing.)
April 12- Quiz on homework after questions were answered. Discussed hypothesis testing on the mean using a tdistribution. Homework: Section 8.4 – 11, 13, 15, 17, 19 and 23. (You may use either the P-value approach or the
Critical Value approach – your choice.) On test you will work at least one hypothesis test using each method.
April 7- completed 3 hypothesis tests during class time. Emphasis was on the “process” using both the p-value method
and the critical value method. Homework: Exercise 8-2 - 17, 19, 21, 23, 25, 27, 29. Exercise 8-3 – 5, 17, 23, 25 and 27.
(Use either method you prefer but show me as much work as you can. )
April 5 – returned homework from last time. Discuss t, z, and chi-square dist. Began discussion of Hypothesis testing.
When using df for a chi-square distribution, but the value closest to the df that you need. Homework: Read the section
at least through page 382 “types of Hypothesis Tests”. Try problems in Section 8-2, 1-3, 5, 6, 13, 15.
March 31 – Returned tests. Reminded students of errors they could eliminate easily. Collected homework. Discussed
𝑡𝛼 and how to keystroke or find it in a table. Discussed confidence intervals for standard deviation or variance using a 𝜒 2
2
distribution. Traits of the chi-squared distribution were discussed. Homework: Section 7-3 – 15 – 21 odd, Section 7-4 5, 7, 9, 11, and 17.
March 29-Discussed keystroking the confidence for a proportion. Reviewed what 𝑍𝛼 means (page 249.) Discussed how
to determine a sample size needed in order to create a confidence interval estimate of the proportion of a population.
Discussed Student’s t-distribution and when it’s used. Defined df (degrees of freedom). Homework: Section 7-2 -21 –
30 multiples of 3, 31, 32, 33 and 36. Page 342 - KNOW Properties of the Student t-distribution. Section 7-3- 9, 11, 13.
OMIT information on page 345 – end of the section
March 24 – Test on 4, 5 and 6. Homework for Tuesday – Section 7-2 – 1-4, 5, 7, 13, 15, 20.
March 22 – Answered questions in preparation for the test on Thursday. Discussed confidence intervals for
proportions.
March 17 – Returned quiz. Answered a homework question. Quiz on homework. Discussed sampling distributions and
the Central Limit Theorem. Homework: 6-4 – 1-5. Section 6-5 – 1-3, 5, 7, 9, 15, 17 and 21.
March 15 – Answered/worked several homework question. Quiz on the standard normal distribution. Discussed finding
percentiles, z𝛼, nonstandard distributions and sampling distributions. Homework: Section 6-2 – 37 – 44; Section 6-3 –
1, 2, 6 – 19 odd, 21, 23, 27, and 32. Test on Chapters 4, 5, and 6 should be March 24.
March 3 – Discussed the mean and standard deviation of a binomial distribution. Discussed the standard normal
distribution, characteristics of it and how to keystroke (only) to find the “area under the curve”. Homework: Section
5.2 – 23, 24. Section 5.3 – 36. Section 5-4 – 1, 2, 3, 5, 7, 9, 11, 13, 15 and 17. Section 6-1. 9, 11, 19, 21, 23, 25, 29, 33
and 49. Test on 4, 5 and 6 will probably be the week of march 21st.
March 1 – Returned the quiz. Answered a couple of homework questions. Rounding was of concern, but the rounding
rule on page 200 is used in the textbook (I prefer more digits, but will accept the Rule). Discussion of a binomial
distribution – a kind of discrete probability distribution followed with specific keystroking details (page 217).
Homework: Students must KNOW the 4 properties of a binomial distribution and the formula to calculate probabilities.
Exercises 5-3 – 1, 5 – 13 odd, 21 – 24, 29, 33, 37.
February 25 –Answered homework questions then gave a quiz. Discussed discrete probability distributions, finding the
mean, variance and standard deviation. Homework: Section 4.6 – 23, 25, 29, 32 and Section 5-2 – 5, 6, 7, 9, 11, 19, 20,
21, 22. READ the section and look at examples if you need more examples. BE SURE TO HAVE YOUR GRAPHING
CALCULATOR IN CLASS ON TUESDAY.
February 23 – Answered one homework question, then discussed conditional probability and the probability of “at least
one”. Returned tests. Homework: Read the sections if you need to see more examples. But especially read sections 4-4
and 4-5. Section 4-4, 17, 21, 23 – 26, 27 Section 4.5 – 5, 9, 11, 15, 19, 20, 21. Section 4.6 – 1, 2, 3, 4, 8, 9, 11, 17,19 and
21.
February 18 – Summarized the rules for probability. Discussed “odds”, the addition rule and the multiplication rule.
Homework: Section 4-2 – 21 – 24, 30, 31, 35, 37 – 41. Section 4-3 – 1, 3, 5, 11, 13, 21 – 24, 33- 38. Section 4-4 - 1,2, 4,
5, 7, 9, 11, 13, 15. Create a sample space for rolling a pair of dice. Write the possible outcomes as ordered pairs (1,1),
(1,2) … (6,6) then calculate the probability of finding each sum possible P(2), P(3). . . P(12) by counting outcomes from
this sample space that you created.
February 16 – Test on Chapters 1-3. Homework for Thursday – Read Section 4.2 and answer questions 1- 19 odd.
February 11 – Answered some homework questions and began the discussion of Chapter 4 – Probability. Test on
Tuesday. Homework on Chapter 4 will appear after the test.
February 9 – Returned graded homework. Discussed CV, Chebyshev’s Theorem, then measures of position (z-score,
percentile, and quartiles) Box-plot. Homework: Section 3-3 – 33, 35, 41,43. Section 3-4 – 1 – 4, 5, 8, 9, 11, 13, 15, 21,
23, 25, 27 and 32. Test is February 16 covering Chapter 1 – 3.
February 2 – Returned graded quizzes then collected homework. Discussed Measures of Variation (spread): range,
standard deviation and variance. The Empirical rule was discussed as well as the range rule of thumb. Homework:
KNOW the empirical rule. Section 3-3 – 1-4, 5, 6, 9,16 and 19. You must show the work for 5 and 9, the other
calculations may be completed with the STAT key on your graphing calculator – Just list the answers and answer any
questions asked.
January 28 – Quiz on homework. Discussed “measures of the center” . Worked several examples using various data
sets. Homework: Section 3-2. 1-4, 5, 6, 9, 13, 14, 20 and 30. You must work 5, 6, 9, and 30 showing all the work and
formulas. You may use the calculator’s capacities to complete 13, 14 and 20. For those you may write only the answer.
Earliest date of the first test is probably February 11.
January 26 – Returned the homework. Discussed pareto charts, pie charts frequency polygon, and ogive. Created
several of the displays and identified others. Homework: Section 2-4. Read “Graphs that deceive”. 15, 17, 19, 21, 22,
24. Chapter Quick Quiz is a good review.
January 21 – Collected Homework due today. Discussed shapes of histograms, scatter plots, time-series graph, dotplot,
stem-and-leaf plot, and Bar graphs. Homework: READ all of Chapter 2. Section 2-2 : 11, 13, 15. Section 2-3 ; 1 – 4 .
Section 2-4; 1-4, 5, 9, 12, 13. First test will come after completion Chapter 3 and correlation/regression.
January 19 – Discussed creating frequency distributions and the vocabulary associated with them, relative frequency
distributions and histograms made from either kind of distribution. Homework: Section 2-2; 1-4, 5, 7, 21, and 26.
Section 2-3; 5-8, 11 and 16 (omit discussion of normal distribution – just make the histogram.)
January 14 – Quiz on assigned homework. Discussion on vocabulary included: discrete & continuous data, levels of
data, kinds of studies, kinds of samples and kinds of errors made in gathering data. Homework: Before attempting the
homework, you should complete your reading of Chapter 1. Section 1-3 -13, 14, 19, 21, 23, 24, 29. Section 1-3 – 6, 7, 8,
9, 10, 11, 16, 19, 23, 24, 27, 28, 29.
January 12 – Discussed vocabulary and ideas on pages 4 – 17. Homework: Download the syllabus and read it with
special attention to how to contact Dr. Floyd, grading, instructional materials, attendance policies, make-up policies,
student responsibilities, etc. READ Chapter 1. Section 1-2 problems: 1-4, 5, 6, 9, 10, 13, 14, 17, 21, 25, 27, 31, and 34.
From Section 1-3: 1-4, 5, 6, 9, and 10.