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A sample of size n = 80 is drawn from a normal populaljon whose standard deviation is o = 8-5. The sample mean is E

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A sample of size n = 80 is drawn from a normal populaljon whose standard deviation is o = 8-5. The sample mean is E = 40-72. (a) Construct a 90% condence interval for p. Round the answer to at least two decimal places. A 90% condence interval for the mean is D

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