Use the given information to find the number of degrees of freedom, the critical values 2χ2L and 2χ2R, and the confidence interval estimate of sigmaσ. It is reasonable to assume that a simple random...

Use the given information to find the number of degrees of freedom, the critical values 2χ2L and 2χ2R, and the confidence interval estimate of

sigmaσ. It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution.

Nicotine in menthol cigarettes 80% confidence; n=2525, s=0.270.27
mg.

Jun 04, 2022

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