The Office of Student Services at a Large Western State

Multiple Choice

The Office of Student Services at a large western state university maintains information on the study habits of its full-time students. Their studies indicate that the mean amount of time undergraduate students study per week is 20 hours. The hours studied follows the normal distribution with a standard deviation of six hours. Suppose we select a random sample of 144 current students. What is the standard error of the mean?

A) 0.50
B) 6.00
C) 0.25
D) 2.00