A study found that people who work at home work an average o

A study found that people who work at home, work an average of 23 hours per week with a standard deviation of 10 hours. What is the standard deviation of the sample mean, xbar for a sample of size 100 (i.e., what is the standard error for a sample of size 100)?

A. 2.3

B. 1

C. 10

D. 0.10

Solution

The standard deviation of x-bar is standard deviation of 10 hours

divided by the square root of the sample size. The sample size is 100, so its square root is 10.

10/10 = 1
HENCE THE ANSWER IS
B. 1