A sample of n = 100 scores is selected from a population with μ = 80 with σ = 20.On average, how much error is expected between the sample mean and the population mean?
A)0.2 points
B)0.8 points
C)2 points
D)4 points

Question

Quizplus · Accepted Answer

The standard error of the mean (SEM) is calculated as σ/√n. Here, σ = 20 and n = 100, so SEM = 20/√100 = 20/10 = 2 points.

A Sample of N = 100 Scores Is Selected from a Population