Mathematics, 29.07.2019 19:20 von2001
The standard deviation of the lifetimes of a sample of 200 electric light bulbs was computed to be 100 hours. find (a) 95% and (b) 99% confidence intervals for the standard deviation of all such light bulbs.
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The standard deviation of the lifetimes of a sample of 200 electric light bulbs was computed to be 1...
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