The blood platelet counts of a group of women have a​ bell-shaped distribution with a mean of 251.8and a standard deviation of 61.2. (All units are 1000 cells/μ​L.) 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 129.4 and 374.2​? b. What is the approximate percentage of women with platelet counts between 68.2 and 435.4​?

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#21- The blood platelet counts of a group of women have a​ bell-shaped distribution with a mean of 251.8and a standard deviation of 61.2. (All units are 1000 cells/μ​L.) 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
129.4
and
374.2​?
b.
What is the approximate percentage of women with platelet counts between
68.2
and
435.4​?
a. Approximately _____​%of women in this group have platelet counts within 2 standard deviations of the​ mean, or between129.4 and 374.2. ​(Type an integer or a decimal. Do not​ round.)
b. Approximately ____​% of women in this group have platelet counts between 68.2 and 435.4. (Type an integer or a decimal. Do not​ round.)
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