Xfollows a normal distribution with mean of1112.5 1112.5and variance of144.2 Standardize an Xvalue of

1000.

It is known that the body mass index (BMI) of healthy American females follows a normal distribution with mean22.5

and standard deviation3.0 About what percentage of female BMI values fall between16.5and28.5

?

Assume is a standard normal random variable with

P(-z

Given a Poisson process (or, experiment)() representing the number of phone calls received at an office inhours, where the average number of calls per hour is2.5

2.5, what is((2)=0) , that no calls occur within a given two-hour interval ?