SOLUTION: (1) if light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviatin of 500 hurs, what percentage of light bulobs have a life less than 250

Question 609895: (1) if light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviatin of 500 hurs, what percentage of light bulobs have a life less than 2500 hours?

Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi

Light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours

what percentage of light bulbs have a life less than 2500 hours(the mean)? 50%

 

RELATED QUESTIONS

If light bulbs have lives that are normally distributed with a mean of 2500 hours and a... (answered by jim_thompson5910)
If light bulbs have lives that are normally distributed with a mean of 2500 hours and a... (answered by jim_thompson5910)
If light bulbs have lives that are normally distributed with a mean of 2500 hours and a... (answered by MathLover1)
If light bulbs have lives tat are normally distributed with a mean f 2500 hours and a... (answered by stanbon)
If light bulbs have lives that are normally distributed with a mean of 2500 hours and a... (answered by ikleyn)
If light bulbs have lives that are normally distributed with a mean of 2500 hours and a... (answered by fractalier)
I would like to see an example for a question. If light bulbs have lives that are... (answered by stanbon)
PLease help, I've posted multiple times but still haven't gotten an answer.
A company... (answered by Theo)
The lifetimes of light bulbs of a particular type are normally distributed with a mean of  (answered by Boreal)