The answer for the problem please

Use the given information to find the number of degrees of freedom, the critical values x, and xp , 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 =27. s =65.9 Click the icon to view the table of Chi-Square critical values. af = (Type a whole number.) X2:0 (Round to three decimal places as needed.) (Round to three decimal places as needed.) The confidence interval estimate of o is