The number of hours a light bulb burns before failing varies from bulb to bulb.
ID: 3332718 • Letter: T
Question
The number of hours a light bulb burns before failing varies from bulb to bulb. The distribution of burnout times is strongly skewed to the right and thus they are not Normally distributed. The Law of Large Numbers says
A. as we look at more and more bulbs, their average burnout time gets closer and closer to the mean burnout time for all bulbs of this type.
B.the average burnout time of a large number of bulbs has a distribution of the same shape as the distribution for individual bulbs.
C.the average burnout time of a large number of bulbs has a distribution that is close to Normal.
D.the average burnout time of a large number of bulbs has a distribution with the same standard deviation as the distribution of burnout times for individual bulbs.
Explanation / Answer
According to the law of large numbers, as the number of experiments increase, the actual ratio of outcomes will converge on theoritical or expected average value.
So the correct answer is
A. as we look at more and more bulbs, their average burnout time gets closer and closer to the mean burnout time for all bulbs of this type.