Use the given information to find the number of degrees of freedom, the critical values chi Subscript Upper L Superscript 2 and chi Subscript Upper R Superscript 2, and the confidence interval estimate of sigma. It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. Nicotine in menthol cigarettes 90% confidence; nequals29, sequals0.23 mg. LOADING... Click the icon to view the table of Chi-Square critical values. Question content area bottom Part 1 dfequals enter your response here (Type a whole number.)