a.
To draw: The side-by-side boxplots of one-year rate of return by sector.
To check: Whether there appear to be a difference in the one-year rate of return for these two sectors.
b.
To explain: The reason for the methods of this section may be used to test whether the mean rate of return for the two sectors differ.
c.
To test: Whether the mean one-year rate of return for consumer cyclical stocks is different from that of industrial stocks at the level of significance.
d.
To construct: The 95% confidence interval for the mean difference in rate of return between industrial stocks and consumer cyclical stocks.
To interpret: The results.
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