Posted by Jessica on .
In a normal distribution with the mean being 500 and the standard deviation being 100, what raw score separates the top 40% of a distribution from the rest?

statistics 
MathGuru,
Find the zscore using a ztable that represents the top 40%. Then use zscore formula to find x.
z = (x  mean)/sd
mean = 500
sd = 100
I hope this will help get you started.