Question

the blood platelet counts of a group of women have a bell - shaped distribution with a mean of 251.6 and a standard deviation of 68.8. (all units are 1000 cells/μl.) 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 114.0 and 389.2?
b. what is the approximate percentage of women with platelet counts between 45.2 and 458.0?
a. approximately % of women in this group have platelet counts within 2 standard deviations of the mean, or between 114.0 and 389.2.
(type an integer or a decimal. do not round)

Explanation:

Step1: Recall the empirical rule

The empirical rule for a bell - shaped (normal) distribution states that approximately 95% of the data lies within 2 standard deviations of the mean.

Answer:

95