Question

The ages of ten employees at a small company are shown below.

30, 32, 35, 35, 38, 38, 38, 40, 40, 45

If the data set were expanded to include a new employee who is 20 years old, how would the mean of the data set change?

A) The mean decreases by 2 years.
B) The mean decreases by about I .6 years.
C) The mean increases by about 1.6 years.
D) The mean does not change.

Answer 1

B

Explanation:

Before you add 20 the mean is 37.1 after you add 20 it’s 35.54.

37.1-35.54=1.56

Round 1.56 to 1.6