Question 1, 7.3.5-T HW Score: 0%, 0 of 8 points Homew O Points: 0 of 1 Save Part 1 of 4 Use the given information to find the number of degrees of freedom, the critical values x, and yo , and the confidence interval estimate of o. It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. Nicotine in menthol cigarettes 80% confidence; n = 22, s = 0.28 mg. Click the icon to view the table of Chi-Square critical values. df = (Type a whole number.)