In Melanie's Styling Salon, the Time to Complete a Simple

Multiple Choice

In Melanie's Styling Salon, the time to complete a simple haircut is normally distributed with a mean of 25 minutes and a standard deviation of 4 minutes. What percentage of customers require less than 32 minutes for a simple haircut?

A) 95.99 percent
B) 99.45 percent
C) 97.72 percent
D) 45.99 percent Using Excel =NORMDIST(32,25,4,1) = 0.9599, or use z = (32 - 25) /4 = 1.75 with AppendixC.