Assume that phone company reports that the average duration of cell phone call is 1.7 minutes, with standard deviation of 1.4 minutes.
1. Would it be reasonable to employ a normal distribution to model the duration of cell phone calls? Explain, based primarily on the values reported above.
2. Assume you want to determine a random sample of 60 cell phone calls. Do you think it would be reasonable to employ the Central Limit Theorem to explain the sampling distribution of the sample mean call duration? Explain.
3. What does the CLT say about the sampling distribution of the sample mean call duration in a random sample of 60 calls?