In response to an inquiry from its national office, the manager of a local bank has stated that her bank’s average service time for a drive-through customer is 93 seconds. A student intern working at the bank happens to be taking a statistics course and is curious as to whether the true average might be some value other than 93 seconds. The intern observes a simple random sample of 50 drive-through customers whose average service time is 89.5 seconds, with a standard deviation of 11.3 seconds. Perform the necessary steps for hypothesis testing and obtain the 99 percent confidenceinterval estimate to arrive at your conclusion. From these sample results, and using the 0.01 level of significance, what conclusion would the student reach with regard to the bank manager’s claim?
In response to an inquiry from its national office, the manager of a local bank has stated that her bank’s average service time for a drive-through customer is 93 seconds. A student intern working at the bank happens to be taking a statistics course and is curious as to whether the true average might be some value other than 93 seconds. The intern observes a simple random sample of 50 drive-through customers whose average service time is 89.5 seconds, with a standard deviation of 11.3 seconds. Perform the necessary steps for hypothesis testing and obtain the 99 percent confidenceinterval estimate to arrive at your conclusion. From these sample results, and using the 0.01 level of significance, what conclusion would the student reach with regard to the bank manager’s claim?
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