5 A Normal World 2. Women have head circumferences that are normally distributed with a mean of 22.65 inches and a standard deviation of 0.80 inch. a. Using the 68-95-99.7 rule, find the percentage of women with head circumferences that are within 0.80 inch of the mean of 22.65 inches. b. Using the 68-95-99.7 rule, find the percentage of women with head circumferences greater than 23.45 inches. c. Is a head circumference of 25.05 inches unusual? Why or why not? 3. Assume that body temperatures of healthy adults are normally distributed with a mean of 98.20 F and a standard deviation of 0.62 F (based on data from