If a statistics class has 25 students, and has a distribution of grades with a mean of 70 and standard deviation of 15, what is the standard error of the mean?
A) .6
B) 1.5
C) 3
D) 6.5

Question

Quizplus · Accepted Answer

The standard error of the mean (SEM) is calculated by dividing the standard deviation by the square root of the sample size: SEM = 15 / √25 = 15 / 5 = 3.

If a Statistics Class Has 25 Students, and Has a Distribution