(Answered) Question according to businessweek the standard amp poors

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Question: According to BusinessWeek, the Standard & Poor's 500 Index posted an average gain of 13% for 2006.12 If a random sample of 50 stocks from this index reveals an average gain of 11% and standard deviation of 6%, can you reject the magazine's claim in a two-tailed test? What is your p-value?

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