SOLUTION: The amount of Jen's monthly phone bill is normally distributed with a mean of $50 and a standard deviation of $10. Find the 25th percentile?

Algebra ->  Probability-and-statistics -> SOLUTION: The amount of Jen's monthly phone bill is normally distributed with a mean of $50 and a standard deviation of $10. Find the 25th percentile?      Log On


   

Question 673689: The amount of Jen's monthly phone bill is normally distributed with a mean of $50 and a standard deviation of $10. Find the 25th percentile?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

μ = 50 ,   σ = 10 

Find the 25th percentile:  z = -.6745

 -.6745 = (x-50)/10   || solve for x