SOLUTION: Suppose the monthly charge for cell phone plans is normally distributed with a mean of $62 and a standard deviation of $18. 1. What percent of the cell plans would be above two st

Algebra ->  Probability-and-statistics -> SOLUTION: Suppose the monthly charge for cell phone plans is normally distributed with a mean of $62 and a standard deviation of $18. 1. What percent of the cell plans would be above two st      Log On


   

Question 665554: Suppose the monthly charge for cell phone plans is normally distributed with a mean of $62 and a standard deviation of $18.
1. What percent of the cell plans would be above two standard deviations above the mean?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Suppose the monthly charge for cell phone plans is normally distributed with a mean of $62 and a standard deviation of $18.
1. What percent of the cell plans would be above two standard deviations above the mean?
-----
Note: That percent does not depend on the value of the mean or the value
of the standard deviation. It is always the percent of the distribution
above z = 2
----
P(z > 2) = normalcdf(2,100) = 0.0228
===================
Cheers,
Stan H.
===================