Test Wednesday Aug. 18

Question
 Explain the difference between a sample and a population.

Answer
 A population is the collection of all elements in a population. A sample is a subset of the elements in the population.

Question
 There is a relationship between smoking cigarettes and getting emphysema. Does this statement describe descriptive statistics or inferential statistics?

Answer
 Inferential statistics

Question
 Classify the colors of automobiles on a used car lot as qualitative data or quantitative data.

 Qualitative Data
Answer

Question
 Classify the number of complaint letters received by the United States Postal
Service in a given day as qualitative or quantitative data.

Answer
 Quantitative Data

Question
 Identify the level of measurement for data that can be classified according to color.

 Nominal
Answer

Question
 Identify the level of measurement for data that are the number of milligrams of tar in
45 cigarettes.

 Ratio
Answer

Question
 Identify the level of measurement for data that can be classified by marriage status
(married, single, or divorced).

 Nominal
Answer

Question
 Identify the level of measurement for data that are a list of 1235 social security numbers.

 Nominal
Answer

Question
 Identify the level of measurement for data that are the ratings of a movie ranging from poor to good to excellent.

 Ordinal
Answer

Question
 Identify the level of measurement for data that are the final grades
(A, B, C, D, and F) for students in a statistics class.

 Ordinal
Answer

Question
 Identify the level of measurement for data that are the annual salaries of all teachers in California.

 Ratio
Answer

Question
 Identify the level of measurement for data that are the amount of fat (in grams) in 24 cookies.

 Ratio
Answer

Question
 Identify the level of measurement for data that are the years the summer Olympics were held in the United States.

 Interval
Answer

Question
 The average daily temperature (in degrees
Fahrenheit) on five randomly selected days are given below. Identify the level of measurement.
 28 31 27 32 28

 Interval
Answer

Question
 Which method of data collection would you use to collect data for a study where a drug was given to 10 patients and a placebo to another group of 10 patients to determine if the drug has an effect on a patient's illness?

Answer
 Perform an experiment

Question
 Thirty-five sophomores, 26 juniors and 41 seniors are randomly selected from 523 sophomores, 365 juniors and 431 seniors at a certain high school. Identify which sampling technique is used.

 Stratified
Answer

Question
 At a local community college, five statistics classes are randomly selected and all of the students from each class are interviewed. Identify which sampling technique is used.

 Cluster
Answer

Question
 A researcher randomly selects and interviews fifty male and fifty female teachers. Identify which sampling technique is used.

 Stratified
Answer

Question
 In a recent television survey, participants were asked to answer "yes" or "no" to the question "Are you in favor of the death penalty?" Six thousand five hundred responded "yes" while 4800 responded
"no". There was a fifty-cent charge for the call. Identify which sampling technique was used.

 Convenience
Answer

Question
 A lobbyist for a major airspace firm assigns a number to each legislator and then uses a computer to randomly generate ten numbers. The lobbyist contacts the legislators corresponding to these numbers. Identify which sampling technique is used.

Answer
 Simple random sample (SRS)

Question
 A sample consists of every 25th student from a group of 1000 students. Identify which sampling technique is used.

 Systematic
Answer

Question
 A market researcher randomly selects 200 drivers under 30 years of age and 200 drivers over 30 years of age. Identify which sampling technique is used.

 Stratified
Answer