SOLUTION: The shelf life of a battery produced by one major company is known to be normally distributed, with a mean life of 3.9 years and a standard deviation of 0.3 years. What is the prob
Algebra ->
Probability-and-statistics
-> SOLUTION: The shelf life of a battery produced by one major company is known to be normally distributed, with a mean life of 3.9 years and a standard deviation of 0.3 years. What is the prob
Log On
Question 867589: The shelf life of a battery produced by one major company is known to be normally distributed, with a mean life of 3.9 years and a standard deviation of 0.3 years. What is the probability that a randomly chosen battery will last more than 3.6 years?
Thanks! Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! The shelf life of a battery produced by one major company is known to be normally distributed, with a mean life of 3.9 years and a standard deviation of 0.3 years. What is the probability that a randomly chosen battery will last more than 3.6 years?
-------
z(3.6) = (3.6-3.9)/0.3 = -0.3/0.3 = -1
-----
P(x > 3.6) = P(z > -1) = normalcdf(-1,100) = 0.8413
---------------------
Cheers,
Stan H.
---------------------
(