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How should they use the information from the labs

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Reference no: EM13532197

Two consumer labs test the lifetime of a new style of washing machines to see whether they will need service under the warranty before the warranty expires. The company would like a 95% confidence interval for the probability. Lab A tests a sample of nA = 25 washing machines.

They find a probability of failure of pA = 0.12. Lab B takes a different, larger sample of nB = 75 machines. They find a probability of failure of pB = 0.24. The company receives reports from both labs.

a) How should they use the information from the labs?
b) Produce the confidence interval.

Reference no: EM13532197

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