Chapter 11.2, Problem 23E

To determine

To find: The population and sample.

Answer to Problem 23E

Population consists of every adult of age $18$ and over in the United States.

Sample consists of $1200$ adults of age $18$ and over who were surveyed.

The sample consists of $750$ adults who believe that UFO’S are watching the Earth, and $450$ adults who do not.

Explanation of Solution

Given:

Consider a newspaper or magazine or article.

Calculation:

In a newspaper a survey is described as,

In the United States, a survey $1200$ of adults ages $18$ and over found that $750$ of them believe that UFO’S are watching the Earth.

Now it is needed to remember that the population is collection of all the data, such as responses, measurements or counts.

A sample is a subset of a population. A portion of a population that can be studied in order to make predictions about the entire population is a sample.

Identify the population and sample in the data given in question.

The population in this case consists of every adult of age $18$ and over in the United States.

The sample here consists of $1200$ adults of age $18$ and over who were surveyed.

The sample consists of $750$ adults who believe that UFO’S are watching the Earth, and $450$ adults who do not.

Conclusion:

Hence, the population consists of every adult of age $18$ and over in the United States.

The sample consists of $1200$ adults of age $18$ and over who were surveyed.

The sample consists of $750$ adults who believe that UFO’S are watching the Earth, and $450$ adults who do not.