Use the given information to find the number of degrees offreedom, the critical values chi Subscript Upper L Superscript 2χ2L and chi Subscript Upper R Superscript 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 99%confidence; n = 26, s = 0.29 mg.

df = (Type a whole number.)

χ2L = (Round to three decimal places as needed.)

χ2R = (Round to three decimal places as needed.)

The confidence interval estimate of σ is __ mg < σ < __ mg. (Round to two decimal places as needed.)