Use the given information to find the number of degrees of freedom, the critical values xz and x, 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 80% confidence; n = 26, s = 65.1. Click the icon to view the table of Chi-Square critical values df = (Type a whole number.) (Round to three decimal places as needed.) (Round to three decimal places as needed.) The confidence interval estimate of o is (Round to one decimal place as needed.)