1 Chapter Review

The jersey numbers of former Chicago Bulls players are: 1,2, 3, 5, 6, 9, 11, 13, 16,20, 22, 26, 32, and 40. Does it make sense to calculate the mean (average) of these numbers?

• Yes

• No

Which of the following best describes the level of measurement of the data (jersey numbers) from question 1?

• nominal

• ordinal

• interval

• ration

A set of data lists the depth (km) of the sources of earthquakes. Are these values discrete or continuous?

• discrete

• continuous

Are the earthquake depths from the previous question quantitative data or categorical data?

• quantitative

• categorical

Which best describes the level of measurement of the earthquake depth data from the previous question?

• nominal

• ordinal

• interval

• ratio

If you construct a sample by selecting every sixth earthquake from the earthquake data set, the result is a simple random sample (srs).

• true

• false

In a recent Gallup poll, pollsters randomly selected adults and asked them whether they smoke. Because the subjects agreed to respond, is the sample a voluntary response sample?

• yes

• no

In a recent Gallup poll, pollsters randomly selected adults and asked them whether they smoke. Among the adults who responded to the survey question, 21% said that they did smoke. Is that value of 21% an example of a statistic or a parameter?

• statistic

• parameter

In the Gallup poll where 21% of adults said they smoked, are the data described the result of an observational study or an experiment?

• observational study

• experiment

True or False: If data lead to a conclusion with statistical significance, then the results also have practical significance.

• True

• False