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

250.4

and a standard deviation of

69.4.

(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 111.6 and 389.2?
b.	What is the approximate percentage of women with platelet counts between 42.2 and 458.6?

Question content area bottom

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

111.6

and

389.2.

(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

42.2

and

458.6.

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