![]() ![]() An analyst at an investment firm knows that the median gain for S&P 500 stocks last year was about 0.078% per day, and it is 0.123% so far this year. Worried about the ailing technology sector, he uses the Wilcoxon test to see if the median gain for technology stocks is different from the known median for all stocks. The data are in the file mutualfund.sav . |
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Testing a Sample Median Against a Known Value |