Question

For the data shown in the stem-and-leaf plot, what is the effect on the mean and median of adding the value 20 to the data set?
























A.

The mean is decreased by about 0.1 and the median is decreased by 2.











B.

The mean is decreased by about 0.1 and the median is decreased by 3.











C.

The mean is decreased by about 0.15 and the median is decreased by 2.











D.

The mean is decreased by about 0.15 and the median is decreased by 3.

Answer 1

Where's the data set?
Hope you can start out by telling us what you've already done, or what you've looked up. What do "mean" and "median" mean in this context?