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GENERAL INSTRUCTION. Answer the following problems and show your complete solution including the formula used in the problem. MAGIC is strictly prohibited! 7. A random

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GENERAL INSTRUCTION. Answer the following problems and show your complete solution including the formula used in the problem. MAGIC is strictly prohibited! 7. A random sample of 40 insomniac patients from a population of 100 were asked to enumerate their sleeping hours. The mean length of these hours is 4 hours with a standard deviation of 0.25 hours. Compute a 99% condence interval for the mean length of sleeping hours of all these patients

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