A mutual fund is a professionally managed investment scheme that pools money from many i...

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.