An estimator is a:
A) parameter and, therefore, a fixed characteristic of a data set.
B) statistic and, therefore, a random variable.
C) statistic and, therefore, a round variable.
D) parameter and, therefore, a random variable.

Question

Quizplus · Accepted Answer

An estimator is a statistic, which means it is based on sample data and is therefore a random variable. Option A is incorrect because a parameter is a fixed characteristic of a population, while an estimator is used to make inferences about the population. Option C is incorrect because "round variable" is not a recognized statistical term. Option D is incorrect because a parameter is a fixed characteristic of a population, not a random variable.

An Estimator Is A