Question: 3. Suppose that a certain cell phone battery has a mean charge life of 18 hours with a standard deviation of 4.5 hours. a) Describe

3. Suppose that a certain cell phone battery has a mean charge life of 18 hours with a standard deviation of 4.5 hours. a) Describe the sampling distribution of the sample mean charge life of a random sample of 40 such batteries. b) What is the probability that a random sample of 40 such batteries has a mean charge life of more than 17 hours

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