1. True or false: The collection of all cars registered in the United States is

Question

1. True or false: The collection of all cars registered in the United States is an example of a population.

2. Are weights of motorcycles discrete data or continuous data?

3. True or false: Selecting every fifth name on a list results in a simple random sample.

4. True or false: The average (mean) age of people who respond to a particular survey is an example of a parameter.

5. For a study in which subjects are treated with a new drug and then observed, is the study observational or is it an experiment?

6. True or false: Eye colors are an example of ordinal data.

7. Fill in the blank: A parameter is a numerical measurement describing some characteristic of a _____.

8. Are movie ratings of G, PG-13, and R quantitative data or categorical data?

9. What is the level of measurement of data consisting of the book categories of science, literature, mathematics, and history (nominal, ordinal, interval, ratio)?

10. A pollster calls 500 randomly selected people, and all 500 respond to her first question. Because the subjects agreed to respond, is the sample a voluntary response sample?

Explanation / Answer

1. True

2. Continous data
They may take on any value within a range of weights

3. False
since it is a systmatic sampling

4. False
since it is a statistic

5. It is an experiment

6. Population

7. This statement is false. Eye color is not an example of ordinal data.

Ordinal data are things that are ranked. In other words, when you look at things where there is a first, a second, a third and so on, you have ordinal data. But eye color is not this kind of data. Blue eyes do not come before brown eyes or vice versa. Therefore, eye color is not an example of ordinal data.

8. Categorical data

9. Book Categoreis --- Nominal. The book categories are names only, and no natural ordering scheme applies.

10) No. Since the people were randomly selected, the responders constitute a random sample of the population.

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