SOLUTION: For a particular brand of TV picture tube, it is known that the mean operating life of the tubes is μ = 9000 hours with a standard deviation of σ = 500 hours. Determine

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Question 925533: For a particular brand of TV picture tube, it is known that the mean operating life of the tubes is μ = 9000 hours with a standard deviation of σ = 500 hours. Determine the expected value and standard error of the sampling distribution of the mean given sample size of n = 25. Interpret the meaning of the computed values.
Answer by stanbon(75887) About Me  (Show Source):
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For a particular brand of TV picture tube, it is known that the mean operating life of the tubes is μ = 9000 hours with a standard deviation of σ = 500 hours. Determine the expected value and standard error of the sampling distribution of the mean given sample size of n = 25. Interpret the meaning of the computed values.
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expected value = mean = 9000
standard error of sampling dist = 500/sqrt(25) = 100
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Cheers,
Stan H.
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