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Math · Statistics And Probability
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please help me with 6 (6), (1)~(5) is already done, thank you!

6. A telephone company claims that the mean duration of all long-distance phone calls made by its residential customers is 10 minutes, A random sample of 100 long-distance calls made by its residential customers taken from the records of this company showed that the mean duration of calls in this sample is 9.0 minutes with a standard deviation of 5.2 minutes. We wish to test Ho : μ- μ # 10. (1) Determine a rejection region such that α-0.05 (2) Based upon the sample data, draw a conclusion that α 0.05 (3) Calculate the p-value based upon the sample data. (4) If α 0.05, based on the p-value calculated in part(3), would you reject the 10 againstH null hypothesis? (5) If a - 0.10, based on the p-value calculated in part (3), would you reject the null hypothesis? (6) Find B and power for part (1) when fu-8

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