Answer to Question #10734 in Statistics and Probability for Shawn

Question

A test has mean of 90, standard deviation of 8 and administered to 240 students. The scores are normally distributed. How many students fell between a z score of 0 and 1.0?

Answer 1

z(0)=0.5 Number with a z-score below 0 is 0.5*240=120

z(1)=0.8413 Number with a z-score below 1 is 0.8413*240=201.9

So 101.9 (102 rounded) students fell between 0 and 1 z-score.