In December 2001 the research firm GfK surveyed baby boomers (Americans born between 1946 and 1964). GfK contacted 1006 randomly selected baby boomers by cell phone or land-line. The
vast majority, 71%, reported that they have provided support to their adult children in the form of
helping them pay for college tuition or loans.

The stem-and-leaf plot shows the heights in centimeters of teddy bear sunflowers grown in two different types of soil. soil a soil b 5 9 5 2 1 1 6 3 9 5 1 0 7 0 2 3 6 7 8 2 1 8 3 0 9 key: 9|6 means 69 key: 5|8 means 58 calculate the mean of each data set. calculate the mean absolute deviation (mad) of each data set. which set is more variable? how do you know?