The following data are the one-year return to investors in world stock investment funds, as published in Pensions & Investments. The data are in percent return (%): 35.9, 34.5, 33.7, 31.7, 27.5, 27.3, 27.3, 27.2, 27.1 25.5. Assume these data constitute a random sample of such funds, and use them to test the claim that the average world stock fund made more than 25% for its investors during this period.
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