The Distribution of Sample Means for Scores on a Test

Multiple Choice

The distribution of sample means for scores on a test for samples of size 100 is normal with a mean of 63.3 and a standard deviation of 1.5. If a sample of 100 test scores is selected at random, what is the probability that the sample mean will be less than 60.6?

A) 0.9641
B) 0.0668
C) 1.8
D) 0.0359