SOLUTION: r the standard normal curve, find the z-score that corresponds to the 90th percentile?

Algebra ->  Probability-and-statistics -> SOLUTION: r the standard normal curve, find the z-score that corresponds to the 90th percentile?      Log On


   

Question 634827: r the standard normal curve, find the z-score that corresponds to the 90th percentile?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

r the standard normal curve, find the z-score that corresponds to the 90th percentile?

Excel function NORMSINV(.90) = 1.2816



Important to Understand z -values as they relate to the Standard Normal curve:

Below:  z = 0, z = ± 1, z= ±2 , z= ±3 are plotted.  

Note: z = 0 (x value the mean) 50% of the area under the curve is to the left and 50%  to the right