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Find the number of students required to estimate the mean.

A registrar wants to estimate the arithmetic mean grade point average (GPA) of all graduating seniors during the past 10 years. GPA range between 2 and 4. The mean GPA is to be estimated within plus or minus .05 of the population mean. The standard deviation is estimated to be 0.279. Use the 99% level of confidence.

Statistics and Probability, Statistics

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