A mutual fund is a professionally managed investment scheme that pools money from many investors and invests in a variety of securities. Growth funds focus primarily on increasing the value of investments, whereas blended funds seek a balance between current income and growth. Here is data on the expense ratio (expenses as a % of assets, from www.morningstar.com) for samples of 20 large-cap balanced funds and 20 large-cap growth funds ("large-cap" refers to the sizes of companies in which the funds invest; the population sizes are 825 and 762, respectively):

a. Calculate and compare the values of , , and s for the two types of funds.
b. Construct a comparative boxplot for the two types of funds, and comment on interesting features.

Bl 1.03 1.23 .10 1.641.30 1.27 1.25 0.78 1.05 0.64 0.94 2.86 .05 0.75 0.09 0.79 126 0.93 0.84 Gr 0.52 1.06 1.26 2.17 .55 0.99 .1007 82.05 0.91 0.79.39 0.62 152 1.02 1.10.78 .0 .15