SOLUTION: A company ships 5000 cellphones that are expected to last an average of 10 000 hours each before requiring repair, with a standard deviation of 500 hours. Assume that the surviva

Algebra ->  Probability-and-statistics -> SOLUTION: A company ships 5000 cellphones that are expected to last an average of 10 000 hours each before requiring repair, with a standard deviation of 500 hours. Assume that the surviva      Log On


   

Question 1196307: A company ships 5000 cellphones that are expected to last an average of 10 000 hours each before
requiring repair, with a standard deviation of 500 hours. Assume that the survival time of the
17
cellphones is normally distributed. If a cellphone is randomly selected for tracking for repairs, find
the expected number requiring repair after 11 000 hours and for between 8250 hours and 10 250 hours
Answer by ikleyn(52794) About Me  (Show Source):
You can put this solution on YOUR website!
.

The normal distribution curve is a bell shaped curve.

The question is to determine the area under the normal distribution curve.


Go to website

https://onlinestatbook.com/2/calculators/normal_dist.html

and use its free of charge online calculator specially intended for such purposes.