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Question 6 ' f4 ' A normal population has a mean of ED and a standard deviation of 12. You select a random sample of

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Question 6 ' f4 ' A normal population has a mean of ED and a standard deviation of 12. You select a random sample of 9. (Refer to a ZScore table} Compute the probability that the sample mean is: a. Greater than 63. b. Less than 56. (2. Between 56 and 63

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