A Sample of N = 16 Scores Is Selected from a Population

Multiple Choice

A sample of n = 16 scores is selected from a population with μ = 80 with σ = 20.On average,how much error would be expected between the sample mean and the population mean?​

A) ​20 points
B) ​5 points
C) ​4 points
D) ​1.25 points