Which statement best describes a parameter?
A)A parameter is a level of confidence associated with an interval about a sample mean or proportion.
B)A parameter is an unbiased estimate of a statistic found by experimentation or polling.
C)A parameter is a sample size that guarantees the error in estimation is within acceptable limits.
D)A parameter is a numerical measure of a population that is almost always unknown and must be estimated.

Question

Quizplus · Accepted Answer

A parameter is a characteristic or measure of a population, such as a mean or standard deviation, which is typically unknown and thus estimated using sample data. Unlike a statistic, which is derived from a sample and used to estimate a parameter, a parameter itself describes the entire population.

Which Statement Best Describes a Parameter