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Undergraduate GPAs It is desired to estimate the mean GPA of each undergraduate class at a large university. How large a sample is necessary to

Undergraduate GPAs It is desired to estimate the mean GPA of each undergraduate class at a large university. How large a sample is necessary to estimate the GPA within 0.27 at the 90% confidence level? The population standard deviation is 1.37. If needed, round your final answer up to the next whole number. The university needs at least a sample of students. X

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