In order to estimate the average time spent per student on the computer terminals at a local university, data were collected for a sample of 81 business students over a one-week period.Assume the population standard deviation is 1.8 hours.The standard error of the mean is
A) 7.50.
B) .39.
C) 2.00.
D) .20.

Question

Quizplus · Accepted Answer

The standard error of the mean is calculated using the formula: standard deviation divided by the square root of the sample size. Here, it is 1.8 / √81 = 0.20.

In Order to Estimate the Average Time Spent Per Student