Question

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

262.8

and a standard deviation of

69.4

​(All units are 1000

​cells/muμ​L.)

Using the empirical​ rule, find each approximate percentage below.

a.	What is the approximate percentage of women with platelet counts within 33 standard deviations of the​ mean, or between 54.6 and 471.0​?
b.	What is the approximate percentage of women with platelet counts between 124.0 and 401.6​?

a. Approximately

nothing​%

of women in this group have platelet counts within

33

standard

deviations

of the​ mean, or between

54.6

and

471.0.

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

b. Approximately

nothing​%

of women in this group have platelet counts between

124.0

and

401.6.

Answer 1

a)

ANS = 99.7%

b)

ANS=95%