A sample of 10 television tubes produced by a company, Civil Engineering

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A sample of 10 television tubes produced by a company

A sample of 10 television tubes produced by a company showed a mean lifetime of 1200 hours and a standard deviation of 100 hours. Estimate

(a) the mean,

(b) the standard deviation of the population of all television tubes produced by this company.

How do we find the standard deviation. ?

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Civil Engineering: A sample of 10 television tubes produced by a company

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Civil Engineering: A sample of 10 television tubes produced by a company

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