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2. A pension fund company carries out a study of a large group of mutual funds and find that their average return over a period

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2. A pension fund company carries out a study of a large group of mutual funds and find that their average return over a period of 5 years was 80% with a standard deviation equal to 30%. If a sample of 50 mutual funds is randomly selected from the group, what is the approximate probability that the sample had an average return greater than 90% over the 5 year period? Z = dec % P = -2 -1 0 1 2 3 Z + O

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