Use the given information to find the number of degrees of freedom, the critical values x and x², 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 95% confidence; n = 27, s= 65.2. 11 Click the icon to view the table of Chi-Square critical values. df= (Type a whole number.) x² = (Round to three decimal places as needed.) x² = (Round to three decimal places as needed.) The confidence interval estimate of o is (Round to one decimal place as needed.)

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.