Through a review of records,Rebecca was able to determine that the mean age of the population she was studying was 23.4 years old.This is known as a(n)
A)statistic.
B)inference.
C)parameter.
D)confidence interval.
E)confidence level.

Question

Quizplus · Accepted Answer

A parameter is a numerical value that summarizes a particular feature of a population, such as its mean or standard deviation. In this case, the mean age of the population is a parameter because it is based on a review of records for the entire population, rather than on a sample of individuals. A statistic, on the other hand, is a numerical value that summarizes a particular feature of a sample, such as its mean or standard deviation. An inference is a conclusion that is drawn about a population based on information from a sample. Confidence intervals and levels are related to the precision and certainty of statistical estimates and inferences.

Through a Review of Records,Rebecca Was Able to Determine That