A teacher needs to grade 200 exams she claims that exams, Business Economics

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A teacher needs to grade 200 exams she claims that exams

A teacher needs to grade 200 exams. She claims that exams require an average of 12 minutes to grade with a standard deviation of 3 minutes. A random sample of 36 exams is selected. Suppose the sample mean is 11 minutes. What is the probability that the sample mean will be less than or equal to 11 minutes if the actual sampling distribution mean equals 12 minutes?

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