On the distribution of the bulb, the central limit theorem say that the average burnout time of a large number of bulbs has a distribution that is close to Normal.
The central limit theorem states that the distribution of sample means the normal distribution as the sample size gets larger.
Thus, on the distribution of the bulb, the central limit theorem say that the average burnout time of a large number of bulbs has a distribution that is close to Normal.
Therefore, the Option A is correct
Missing options "A. The average burnout time of a large number of bulbs has a distribution that is close to Normal. B. The average burnout time of a large number of bulbs has a distribution of the same shape (strongly skewed) as the distribution for individual bulbs. C. As we look at more and more bulbs, their average burnout time gets ever closer to the mean for all bulbs of this type."
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