Whenever sample data are used for estimating a population mean or proportion,sampling error will not be present,since the observed sample statistic ( $\bar { x }$ or p)will not differ from the actual value of the population parameter ( $\mu$ or $\pi$ ).

Question

Quizplus · Accepted Answer

Sampling error refers to the natural variation that occurs between different random samples taken from the same population. Therefore, it is always present when using sample data to estimate population parameters. The observed sample statistic will almost always differ from the actual population parameter to some extent due to sampling error.

Whenever Sample Data Are Used for Estimating a Population Mean xˉ\bar { x }xˉ

Whenever Sample Data Are Used for Estimating a Population Mean $\bar { x }$