Solution-Confidence intervals for estimating the population

Confidence intervals for estimating the population mean

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Reference no: EM131565669

Question: Suppose that the standard deviation of the tube life for a particular brand of TV picture tube is known to be s = 500, but that the mean operating life is not known. Overall, the operating life of the tubes is assumed to be approximately normally distributed. For a sample of n = 15, the mean operating life is X = 8,900 hr. Determine

(a) the 95 percent and

(b) the 90 percent confidence intervals for estimating the population mean.

Reference no: EM131565669

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Confidence intervals for estimating the population mean : Suppose that the standard deviation of the tube life for a particular brand of TV picture tube is known to be s = 500, but that the mean operating life.

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Confidence intervals for estimating the population mean

Reference no: EM131565669

Reference no: EM131565669

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