Question

Lisa Grattan, a financial analyst for a small investment firm, collects annual stock return data for 10 firms in the energy industry, 13 firms in the retail industry, and 16 firms in the utilities industry. A portion of the data is shown in the accompanying table; the entire data set, labeled Industry_Returns, can be found on the text website.


In a report, use the sample information to:
1. Determine whether significant differences exist in the annual returns for the three industries at the 5% significance level. Assume that returns are normally distributed.
2. Interpret yourresults.


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  • CreatedJanuary 28, 2015
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