Question: With reference to the data in Exercise 16.11, make a total time on test plot. Data From Exercise 16.11 16.11 In a nonreplacement life test,

With reference to the data in Exercise 16.11, make a total time on test plot.

Data From Exercise 16.11

16.11 In a nonreplacement life test, 50 water turbines were put into

16.11 In a nonreplacement life test, 50 water turbines were put into continuous operation, and the first 3 failures occurred after 400, 600, and 1,050 hours. (a) Assuming the exponential model, construct an 85% confidence interval for the mean life of this kind of water turbines. (b) To check the manufacturer's claim that the mean life of these turbines is greater than 7,500 hours, test the null hypothesis = 7,500 against an ap- propriate alternative, so that the burden of proof is put on the manufacturer. Use a = 0.005.

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