Question

a survey of 1001 u.s. adults found that 46.8% of respondents typically feel well rested on weekdays. identify the population and the sample. describe the sample data set. what is the population in the given problem? a. the responses of all u.s. adults b. 46.8% of all u.s. adults c. the 1001 u.s. adults selected d. 46.8% of the 1001 u.s. adults selected identify the sample for the given problem. choose the correct answer below. a. the responses of all u.s. adults b. 46.8% of the 1001 u.s. adults selected c. 46.8% of all u.s. adults d. the 1001 u.s. adults selected describe the sample data set. choose the correct answer below. a. 1001 u.s. adults who do not typically feel well rested on weekdays b. 53.2% of the 1001 u.s. adults who typically feel well rested on weekdays and 46.8% of the 1001 u.s. adults who do not typically feel well rested on weekdays c. 1001 u.s. adults who typically feel well rested on weekdays d. 46.8% of the 1001 u.s. adults who typically feel well rested on weekdays and 53.2% of the 1001 u.s. adults who do not typically feel well rested on weekdays

Explanation:

First Sub - Question (Population)

The population in a survey is the entire group we want to study. Here, we want to study U.S. adults, so the population is the responses of all U.S. adults (since we care about their responses regarding feeling well - rested). Option A is correct as Option B is a percentage (a statistic), Option C is the sample, and Option D is a percentage of the sample.

A sample is a subset of the population. In this survey, 1001 U.S. adults were selected to be surveyed. So the sample is the 1001 U.S. adults selected. Option A is the population, Option B is a percentage of the sample, Option C is a percentage of the population, and Option D is the correct sample.

The sample data set describes the data from the sample. 46.8% of the 1001 U.S. adults selected typically feel well - rested on weekdays, so 100% - 46.8% = 53.2% do not. So the sample data set is 46.8% of the 1001 U.S. adults who typically feel well rested on weekdays and 53.2% of the 1001 U.S. adults who do not typically feel well rested on weekdays. Option A is only about those who do not, Option B has the percentages reversed, Option C is only about those who do, and Option D is correct.

Answer:

A. The responses of all U.S. adults

Second Sub - Question (Sample)