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Suppose the test scores of 75 students in a class follows normal distribution with a standard deviation of 3. The sample mean is 68. What

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Suppose the test scores of 75 students in a class follows normal distribution with a standard deviation of 3. The sample mean is 68. What distribution is used in constructing confidence intervals in this problem? z-distribution What is Maximal Margin of Error (E) at 95% confidence? Select ] Construct a 95% confidence interval (67.32101,68.67896)

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