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.... Lifetime of electronics: In a simple random sample of 100 electronic components produced by a certain method, the mean lifetime was 125 hours. Assume

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Lifetime of electronics: In a simple random sample of 100 electronic components produced by a certain method, the mean lifetime was 125 hours. Assume that component lifetimes are normally distributed with population standard deviation 6 = 20 hours. Round the critical value to no less than three decimal places. (a) Construct a 98% confidence interval for the mean battery life. Round the answer to the nearest whole number. A 98% condence interval for the mean battery life is E]

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