1. Determine whether the statement is true or false. If it is false, rewrite it as a true statement.
A statistic is a measure that describes a population characteristic.
2. Determine whether the data set is a population or a sample. Explain your reasoning.
The age of each member of the House of Representatives.
3. Use the Venn diagram to identify the population and the sample.
4. Determine whether the underlined numerical value is a parameter or a statistic. Explain your reasoning.
In a phone survey of 100 random homes in a country, 21 families had garages.
5. Suppose that a study based on a sample from a targeted population shows that professional basketball players are taller than people who are not.
a. Make an inference based on the results of the study.
b. What might this inference incorrectly imply?
6. Determine whether the variable is qualitative or quantitative.
Number of words in a speech.
7. The regions of a country with the six highest levels of coal production last year are shown below.
1. Northwest 2. Southwest 3. Northwest 4. Southeast 5. Northern 6. Western
Determine whether the data are qualitative or quantitative and identify the data set's level of measurement.
8. The temperature (in oC) of water samples taken simultaneously in a large lake are shown below.
23.3 23.7 26.6 23.1 24.2 25.6 25.6 25.2 22.1
Determine whether the data are qualitative or quantitative and identify the data set's level of measurement.
9. The graph to the right shows the responses to the question, "does global warming contribute to E1 Nino?"
Identify the level of measurement of the data listed on the horizontal axis in the graph.
10. The following appear on a physician's intake form. Identify the level of measurement of the data.
a. Temperature
b. Happiness level (scale of 0 to 10)
c. Time since last visit
d. Marital status
11. Determine whether the statement is true or false. If it is false, rewrite it as a true statement.
Using a systematic sample guarantees that members of each group within a population will be sampled.
12. Determine whether the statement is true or false. If it is false, rewrite it as a true statement.
The method for selecting a stratified sample is to order a population in some way and then select members of the population at regular intervals.
13. Decide which method of data collection you would use to collect data for the study.
A study of the effect on the human digestive system of a popular soda made with less carbonation.
14. Decide which method of data collection you would use to collect data for the study described below.
A study of how fast a fire would spread through the canopy of a forest.
15. A radio station asks its listeners to call in their opinion regarding the format of the morning show.
What type of sampling is used?
16. Toyota wants to administer a satisfaction survey to its current customers. Using their customer database, the company randomly selects 40 customers and asks them about their level of satisfaction with the company.
What type of sampling is used?
17. Determine whether you would take a census or use a sampling to collect data for the study described below. The most popular grocery store among the 55 employees of a company.
18. Determine if the survey question is biased. If the question is biased, suggest a better wording. Why is eating potato chips bad for you?
19. Determine whether the survey question is biased. If the question is biased, suggest a better wording. Why is drinking soda bad for you?
20. Determine whether the survey question is biased. If the question is biased, suggest a better wording. Why is eating eggs bad for you?