Part 1 Use the given information to find the number of degrees of freedom, the critical values y- 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. Platelet Counts of Women 90% confidence; n = 26, s = 65.7. Click the icon to view the table of Chi-Square critical values. df =(Type a whole number.) X Vi Vi More