
Normal Distribution
Not sure where to begin on this problem. Is there a way you can just enter the values into a TI84 or is there a formula I should know? Thanks for your help.
The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). The mean maximum oxygen uptake for elite athletes has been found to be http://webwork2.asu.edu/webwork2_fil...1843bc5e61.png with a standard deviation of http://webwork2.asu.edu/webwork2_fil...08ae84a5c1.png. Assume that the distribution is approximately normal.
1) What is the probability that an elite athlete has a maximum oxygen uptake of at least http://webwork2.asu.edu/webwork2_fil...eb60784d11.png ml/kg?
2) What is the probability that an elite athlete has a maximum oxygen uptake of http://webwork2.asu.edu/webwork2_fil...6e68110211.png ml/kg or lower?

Nevermind. I figured it out.

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). The mean maximum oxygen uptake for elite athletes has been found to be http://webwork2.asu.edu/webwork2_fil...1843bc5e61.png with a standard deviation of http://webwork2.asu.edu/webwork2_fil...08ae84a5c1.png. Assume that the distribution is approximately normal.
1) What is the probability that an elite athlete has a maximum oxygen uptake of at least http://webwork2.asu.edu/webwork2_fil...eb60784d11.png ml/kg?
$\displaystyle P(X>55) = 1  P(X<55)$
$\displaystyle Z=(5570)/7.7$
= $\displaystyle 1P(Z<15/7.7)$
now all you need is Neave's table
2) What is the probability that an elite athlete has a maximum oxygen uptake of http://webwork2.asu.edu/webwork2_fil...6e68110211.png ml/kg or lower?
$\displaystyle P(X<50)$