Use the given information to find the number of degrees of freedom, the critical values xi and x', and the confidence interval estimate of 0'. 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% condence; n = 24, s = 0.21 mg. 5 Click the icon to View the table of ChiSquare critical values. Use the given information to find the number of degrees of freedom, the critical values XE and Xi, and the confidence interval estimate of c'. It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. Platelet Counts of Women 98% confidence; n = 25, s = 65.5. 5 Click the icon to View the table of ChiSquare critical values. A simple random sample from a population with a normal distribution of 98 body temperatures has )_(= 98.20F and s = 0.61F. Construct a 95% condence interval estimate of the standard deviation of body temperature of all healthy humans. a Click the icon to View the table of ChiSquare critical values. DF