The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 260.3 and a standard deviation of 69.7. (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 190.6 and 330.0?
b. What is the approximate percentage of women with platelet counts between 51.2 and 469.4?
By Empirical rule
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