SOLUTION: assume that the random variable X is normally distributed, with mean m = 50 and standard deviation s = 7. Find each indicated percentile for X. The 90th percentile?

Algebra ->  Probability-and-statistics -> SOLUTION: assume that the random variable X is normally distributed, with mean m = 50 and standard deviation s = 7. Find each indicated percentile for X. The 90th percentile?       Log On


   

Question 898765: assume that the random variable X is normally distributed, with mean m = 50 and standard deviation s = 7. Find each indicated percentile for X.
The 90th percentile?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
90% then z = invNorm(.90) = 1.2816
z = 1.2816 = (X-50)/7
7(1.2816) + 50 = 8.97 + 50 = X = 59