Managers at a local phone service wireless retail center have a goal that 77% of

Question

Managers at a local phone service wireless retail center have a goal that 77% of the center's customers will have to wait less than five minutes for service. The data below shows the wait times of a random sample of 25 customers in minutes. Does this sample provide evidence that management's goal is being achieved? Click the icon to view the random sample of wait times. Does this sample provide evidence that management's goal is being achieved? (Round to four decimal places as needed.) O A. Yes, because the probability of observing a sample proportion as low as the one in this sample given a population proportion of 0.77 is which is more than 0.05. O B. No, because the probability of observing a sample proportion as low as the one in this sample given a population proportion of 0.77 is which is less than 0.05. O C. Yes, because the probability of observing a sample proportion as low as the one in this sample given a population proportion of 0.77 is which is less than 0.05. O D. No, because the probability of observing a sample proportion as low as the one in this sample given a population proportion of 0.77 is hich is more than 0.05. Sample wait Times 4.3 5.5 2.3 10.1 3.6 3.4 0.4 7.7 4.9 3.9 4.8 2.8 3.4 9.2 6.8 5.5 4.6 0.3 2.5 5.7 4.4 3.7 2.8 2.5 4.4

Explanation / Answer

a. The number of people having wait time less than 5 minutes is 18 out of 25 i.e 18/25 is 0.72

Hence C is the correct option to chose

b.41.5 and 51.5 are drawn from systematic sampling

sampling error = population mean - sample mean = 1.5

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