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Part 1
The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 263.5 and a standard deviation of 61.5. (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 2 standard deviations of the mean, or between 140.5 and 386.5?
b.
What is the approximate percentage of women with platelet counts between 79.0 and 448.0?
