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In a simple random sample of 100electronic components produced by a certain method, the mean lifetime was 125hours. Assume that component lifetimes are normally distributed with population standard deviation =20hours. Round the critical value to no less than three decimal places.(a) Construct a 99%confidence interval for the mean battery life. Round the answer to the nearest whole number.A 99%confidence interval for the mean battery life is ___< mu < ___

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