Create confidence interval for the standard deviation

Reference no: EM13149404

The mean replacement time for a random sample of 20 washing machines is 9.4 years and the standard deviation is 2.6 years. Construct a 99% confidence interval for the standard deviation, σ, of the replacement times of all washing machines of this type.

Reference no: EM13149404

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Create confidence interval for the standard deviation : Construct a 99% confidence interval for the standard deviation, σ, of the replacement times of all washing machines of this type.

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