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

Use the given information to find the number of degrees of freedom, the critical values

χ2L

and

χ2R,

and the confidence interval estimate of

σ.

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=29,

s=0.22

mg.

Jun 08, 2022

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