7.3.5-T Question Help Use the given information to find the number of degrees of freedom, the critical values x x{ and xp, and the confidence interval estimate of o. It is reasonable to assume that simple random sample has been selected from a population with a normal distribution Nicotine in menthol cigarettes 80% confidence; n = 26, s = 0.26 mg. Click the icon to view the table of Chi-Square critical values. df = (Type a whole number.)​