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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?
x
X
(Note: A negative difference indicates the call is shorter than the average.)
DA 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.
A.-2.3
B. -0.4
C. 0.4
D. 1.6

Answer :

Using the mean concept, it is found that the mean difference between the call times and the  company's average call time is given by:

  • C. 0.4

What is the mean?

  • The mean of a data-set is given by the sum of all observations in the data-set divided by the number of observations.

In this problem:

  • The four observations are the differences between the time of each phone call and the average time.
  • They are: {-2.32, -1.55, 4.79, 0.68}

Hence, the mean difference is:

[tex]M = \frac{-2.32 - 1.55 + 4.79 + 0.68}{4} = 0.4[/tex]

Hence, option C is correct.

To learn more about the mean concept, you can take a look at https://brainly.com/question/13451786

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