Question

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

259.1259.1

and a standard deviation of

60.960.9.

​(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 22 standard deviationsdeviations of the​ mean, or between 137.3137.3 and 380.9380.9​?
b.	What is the approximate percentage of women with platelet counts between 198.2198.2 and 320.0320.0​?

a. Approximately

nothing​%

of women in this group have platelet counts within

22

standard

deviationsdeviations

of the​ mean, or between

137.3137.3

and

380.9380.9.

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

b. Approximately

nothing​%

of women in this group have platelet counts between

198.2198.2

and

320.0320.0.

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

Answer 1