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GPAs at a large university are known to follow a normal distribution. It is calculated that, in order to estimate the true mean GPA

GPAs at a large university are known to follow a normal distribution. It is calculated that, in order to estimate the true mean GPA of all students at the university to within 0.18 with 99% confidence, we need a sample of 72 students. What sample size would be required to estimate the true mean GPA to within 0.03 with 99% confidence? 12 177 432 2592 2

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