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3) The dean of faculty of a large state university wants to estimate the average teaching experience (in years) of the faculty members. From past

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3) The dean of faculty of a large state university wants to estimate the average teaching experience (in years) of the faculty members. From past experience, he knows that the standard deviation of the years of teaching experience is 3.4 years. How large a sample should be used if the dean wants to be 96% confident that the sample mean does not differ from the true population mean by more than half of a year

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