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Chapter 7: Problem 1

In 2017 the Gallup poll surveyed 1021 adults in the United States and found that \(57 \%\) supported a ban on smoking in public places. a. Identify the population and the sample. b. What is the parameter of interest? What is the statistic?

Short Answer

Expert verified
The population is all adults in the United States. The sample is the 1021 adults surveyed by the Gallup poll. The parameter of interest is the actual percentage of all adults in the U.S. who support a ban on smoking in public places. The statistic is the 57% of the sampled adults who support a ban.

Step by step solution

01

Identify the Population

The population in a statistical study is the entire group of individuals or items that we want information about. In this case, the population is all adults in the United States.
02

Identify the Sample

The sample in a statistical study is the part of the population that we actually examine in order to gather information. Here, the sample is the 1021 adults that were surveyed by the Gallup poll in 2017.
03

Identify the Parameter of Interest

The parameter is a numerical measurement describing some characteristic of a population. Here, the parameter of interest is the actual percentage of all adults in the United States who support a ban on smoking in public places.
04

Identify the Statistic

A statistic is a numerical measurement describing some characteristic of a sample. Here, the statistic is the 57% of the sampled adults who supported a ban on smoking in public places.

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