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Part 1

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

246.9

and a standard deviation of

61.5.

(All units are 1000

cells/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 123.9 and 369.9?
b.	What is the approximate percentage of women with platelet counts between 185.4 and 308.4?

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Part 1

a. Approximately

enter your response here%

of women in this group have platelet counts within

2

standard

deviations

of the mean, or between

123.9

and

369.9.

(Type an integer or a decimal. Do not round.)

Part 2

b. Approximately

enter your response here%

of women in this group have platelet counts between

185.4

and

308.4.