Solve the Problem

Multiple Choice

Solve the problem. Round your answer to one decimal place, if necessary.
-The distribution of sample means for a group of test scores for samples of 100 scores is normal with a mean of 63.9 and a standard deviation of 1.8. Suppose you take a sample of 100 test scores and find that the mean is 65.5.
How many standard deviations is the sample mean from the mean of the distribution of sample means?

A) 1.6 standard deviation(s) above the mean
B) 0.8 standard deviation(s) above the mean
C) 0.9 standard deviation(s) above the mean
D) 8.9 standard deviation(s) above the mean