Author Question: If we know that a set of test scores has a mean of 75 and a standard deviation of 8, we would ... (Read 90 times)

olgavictoria · **on:** Jun 20, 2018

If we know that a set of test scores has a mean of 75 and a standard deviation of 8, we would conclude that

a. the average deviation from the mean is about 8 points.
b. the average person will have a score of 75 + 8 = 83.
c. more people are above 75 than below it.
d. You can't tell anything about how scores lie relative to the mean.

Question 2

The standard deviation for the numbers 8, 9, and 10 is

a. -3.0
b. 0.0
c. .67
d. 1.0