Which of the following is a population parameter?
A) the proportion of U.S. residents age 65 and older
B) the mean age of a group of college student research participants
C) the correlation between age and attitudes toward nuclear power in a group of research participants recruited at a shopping mall
D) the standard deviation of the ages of a group of research participants recruited from church groups

Question

Quizplus · Accepted Answer

A population parameter is a characteristic of a population, which refers to the entire group being studied. The proportion of U.S. residents age 65 and older is a characteristic of the entire population of U.S. residents, making it a population parameter. B, C, and D are all characteristics of a specific sample, making them sample statistics rather than population parameters.

Which of the Following Is a Population Parameter