Question
The average return for 500 of the largest U.S. companies in the Standard and Poor's 500 index (S&P500) last year was 11.4%. Can we say
The average return for 500 of the largest U.S. companies in the Standard and Poor's 500 index (S&P500) last year was 11.4%.
Can we say with 95% confidence that the average return for all stocks last year in this particular category differed from the S&P500 last year? Why or why not?
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An Introduction to Analysis
Authors: William R. Wade
4th edition
132296381, 978-0132296380
