Question

The customer service center in a large new york department store has determined that the amount of time spent with a customer about a complaint is normally distributed, with a mean of 8.7 minutes and a standard deviation of 2.1 minutes. what is the probability that for a randomly chosen customer with a complaint, the amount of time spent resolving the complaint will be as follows. (round your answers to four decimal places.)

Answer 1

Since you didn't give an amount of time, we can't give an exact value. However, I can help you with the steps so you can get the correct answer.

First, you need to find the correct z-score. Then, use a standard normal distribution table to find the percent.

Let the time that you are looking for equal X. 

The formula for your z-score is:

(x - 8.7) / 2.1 = z-score