Chapter 7, Problem 1PT

To determine

The correct statement which is true about the boldface numbers that (a) 72% is a sample; 56% is a population, (b) 72% and 56% are both statistics, (c) 72% is a statistic and 56% is a parameter, (d) 72% is a parameter and 56% is a statistic, (e) 72% and 56% are both parameters.

Answer to Problem 1PT

The correct answer is (c).

Explanation of Solution

Given information:

Number of registered voters = 663

Percent of voters who said they voted in the election = 72%

Percent of registered voters who voted in the election = 56%

Know that a descriptive measure for a population is a parameter and a descriptive measure for a sample is a statistic.

Here, since the proportion 72% is based on the study of randomly selected numbers of voters that is, 663; so 72% is a statistic.

Also, the proportion 56% is based on all registered voters. This means the 52% is a parameter.

Thus, 72% is a statistic and 56% is a parameter.

Hence, the correct answer is (c).