Which is better: a score of 82 on a test with a mean of 70 and a standard deviation of 8, or a score of 82 on a test with a mean of 75 and a standard deviation of 4?
1 Answer
Feb 21, 2017
Work out the number os SD's you are from the mean:
Explanation:
First case:
Second case:
This means that in percentile ranking you're better off with the second result.
