The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 257.1 and a standard deviation of 69.6. (All units are 1000 cells/muL.) Using the empirical rule, find each approximate percentage below. a. What is the approximate percentage of women with platelet counts within 1 standard deviation of the mean, or between 187.5 and 326.7? b. What is the approximate percentage of women with platelet counts between 48.3 and 465.9?
