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. The slowest quartile of customers will require longer than how many minutes for a simple haircut?

A) 3(n + 1) /4 minutes
B) 26 minutes
C) 25.7 minutes
D) 27.7 minutes Using Excel =NORM.INV(.75,25,4) = 27.698, or Q₃ = 25 + 0.675(4) = 27.7 using AppendixC.