The blood platelet counts of a group of women have a​ bell-shaped distribution with a mean...

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The blood platelet counts of a group of women have a​bell-shaped distribution with a mean of 259.5 and a standarddeviation of 66.4. ​(All units are 1000 ​cells/mu​L.) Using theempirical​ rule, find each approximate percentage below.

a.

What is the approximate percentage of women with platelet countswithin 3 standard deviations of the​ mean, or between 60.3 and458.7​?

b.

What is the approximate percentage of women with platelet countsbetween 126.7 and 392.3​?

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