Question 3: Statistical Inference 15. The mean service time at the McDonalds in Kennedy Town is 3 minutes. Assume the service time follows an exponential distribution. The standard deviation of the population is 3 minutes. You observe service times for a random sample of 49 customers at the McDonalds. What is the probability that the sample mean is more than 4 minutes? 16. A procurement manager at Best Buy wants to find out the population mean monthly sales of 4K TV at stores in the Midwest. Best Buy's current inventory policy is set under the

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