Fortune magazine’s list of the world’s most admired companies for 2014 is provided the data contained in the DATAfile named AdmiredCompanies (Fortune, March 17, 2014). The data in the column labeled Return shows the one-year total return (%) for the top-50 ranked companies. For the same time period the S&P average return was 18.4%.

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?