A researcher measured the pulse of a random sample of students finishing the SAT exam. The results of the study were sample size = 25, sample mean = 80, and sample standard deviation = 20. What is the best estimate for the standard error of the sampling distribution?
A) 3.2
B) 4
C) 5
D) 16

Question

Quizplus · Accepted Answer

The formula for standard error of the mean is SE = s/√n, where s is the sample standard deviation and n is the sample size. Plugging in the values given, SE = 20/√25 = 4. Therefore, the best estimate for the standard error of the sampling distribution is 4.

A Researcher Measured the Pulse of a Random Sample of Students