S Stephen Active member Oct 31, 2010 #1 Suppose that scores on a particular test are normally distributed with a mean of 110 and a standard deviation of 20. What is the minimum score needed to be in the top 15% of the scores on the test? Please show the formula. Thank you.
Suppose that scores on a particular test are normally distributed with a mean of 110 and a standard deviation of 20. What is the minimum score needed to be in the top 15% of the scores on the test? Please show the formula. Thank you.
