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Use the given information to find the number of degrees of freedom, the critical values xL2...

Use the given information to find the number of degrees of freedom, the critical values xL2 and xR2, and the confidence interval estimate of the population standard deviation. It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution.
Nicotine in menthol cigarettes 95% confidence; n=22, s=0.25 mg.

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Answer #1

confidence interval for standard deviation is, (019234 mg, 0.35727 mg)

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