Lisa Mendes and Brad Lee work in the sales department of an AT&T Wireless Store. Lisa has been signing in an average of 48 new cell phone customers every month with a standard deviation of 22, while Brad signs in an average of 56 new customers with a standard deviation of 17. The store manager offers both Lisa and Brad a $100 incentive bonus if they can sign in more than 100 new customers in a month. Assume a normal distribution to answer the following questions.

a. What is the probability that Lisa will earn the $100 incentive bonus?

b. What is the probability that Brad will earn the $100 incentive bonus?

c. Are you surprised by the results? Explain. LO5