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?

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) (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

 

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