Chapter 1.4, Problem 53E

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):

B1	1.03	1.23	1.10	1.64	1.30
	1.27	1.25	0.78	1.05	0.64
	0.94	2.86	1.05	0.75	0.09
	0.79	1.61	1.26	0.93	0.84

Gr	0.52	1.06	1.26	2.17	1.55
	0.99	1.10	1.07	1.81	2.05
	0.91	0.79	1.39	0.62	1.52
	1.02	1.10	1.78	1.01	1.15

1. a. Calculate and compare the values of $\bar{x},\stackrel{o}{x},$ and s for the two types of funds.
2. b. Construct a comparative boxplot for the two types of funds, and comment on interesting features.