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

Question

Quizplus · Accepted Answer

The percentage of customers who require less than 32 minutes for a simple haircut can be calculated using the normal distribution. The z-score for 32 minutes is (32 - 25) / 4 = 1.75. The area under the normal distribution curve to the left of z = 1.75 is 0.9599, or 95.99%.

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