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 95​% ​confidence; n=22​, s=0.26 mg. df= (type a whole number) X2/L= (round to three decimal places as needed) X2/R= (round to three decimal places as needed) The confidence interval estimate of σ is __ mg < σ < __ mg. (round to two decimal places as needed)

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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 95​% ​confidence; n=22​, s=0.26 mg.

df=

(type a whole number)

X2/L=

(round to three decimal places as needed)

X2/R=

(round to three decimal places as needed)

The confidence interval estimate of σ is __ mg < σ < __ mg.

(round to two decimal places as needed)

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