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Question 10 options: The average local cell phone call length was reported to be 3.75 minutes. A random sample of 21 phone calls showed an

Question 10 options:

The average local cell phone call length was reported to be 3.75 minutes. A random sample of 21 phone calls showed an average of 3.95 minutes in length with a standard deviation of 0.91 minutes. At = 0.05, can it be concluded that the average local cell phone call length is more than the population average? Assume that the population is approximately normally distributed.

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