SOLUTION: Light bulbs from the Bright Eyes Electric Company have a known mean lifetime of 800 hours and a standard deviation of 60 hours. This data is normally distributed. Find the probabil

Algebra ->  Probability-and-statistics -> SOLUTION: Light bulbs from the Bright Eyes Electric Company have a known mean lifetime of 800 hours and a standard deviation of 60 hours. This data is normally distributed. Find the probabil      Log On

 

Hi,

 = 800 hours and = 60 hours

Find the probability that a random sample of 16 bulbs will have a mean lifetime between 790 and 810 hours.

*Note: 

P( z = 10/15)  - P(z = -10/15) = .7475 -.2525