Question

.As the operations manager of the post-sales department, you need to estimate the average duration of an on-site visit by your technical staff. Based on the information in the service call log shown, what is the average time needed for an on-site visit? Service Call Duration 45 min 55 min 1 hr 35 min 1 hr 15 min 50 min O A 40 minutes O В. 1 hour 4 minutes O С. 1 hour 20 minutes D 4 hours O E 5 hours 20 minutes

Answer 1

The mean (or average) is given as:

$\frac{\sum ^{}_{}x_i}{n}$

where xi is the value of each data and n is the total number of data. In this case we have:

$\frac{45+55+95+75+50}{5}=64$

Therefore the average is 1 hour 4 minutes and the answer is B.