Choose the answer. 3. (1 pt) For the data shown in the stem-and-leaf plot, what is the effect on the mean and median of adding the value 30 to the data set?
a. The mean is increased by about 0.4 and the median is increased by 3.
b. The mean is increased by about 0.4 and the median is increased by 4.
c. The mean is increased by about 0.6 and the median is increased by 3.
d. The mean is increased by about 0.6 and the median is increased by 4.
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