Your company takes orders over the phone. The company’s average call time is 4.6 minutes. The graph below shows 4 calls and the difference between the call time and the company’s average call time. For these 4 calls, what is the mean difference between the call times and the company’s average call time, rounded to the nearest 0.1 minute?

(Note: A negative difference indicates the call is shorter than the average.)

A bar graph showing the difference between average call time and the call time for four calls. The values are: Call 1, negative 2.32 minutes. Call 2, negative 1.55 minutes. Call three, positive 4.79 minutes. Call four, positive 0.68 minutes.