Use the given information to find the number of degrees of freedom, the critical values x2/l...

Use the given information to find the number of degrees of freedom, the critical values x2/l and x2/r, 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 99% confidence; n=20, s=0.28 mg.

Solutions

Expert Solution

Degree of freedom = n-1 = 20-1 = 19

Crtical values calculated using R software

Confidence interval is calculated using Minitab.

CI = (0.196 , 0.467 )

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orchestra answered 1 year ago

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