The mean of a set of test scores is 86 and the standard deviation is 3. If there are 200 test scores in the data sample, how many of them were in the 86% to 89% range?

a. 32
b. 68
c. 5
d. 27

Question

The mean of a set of test scores is 86 and the standard deviation is 3. If there are 200 test scores in the data sample, how many of them were in the 86% to 89% range?

a. 32
b. 68
c. 5
d. 27

muzzack · Answer

i would say b

anonymous · Answer

@Rbnprettygirl please don't grab anyone's work from a different site. I understand that you're trying to help, but please use your own words to solve this problem. https://answers.yahoo.com/question/index?qid=20130716164459AAWQEq7