TABLE 6-7
A company has 125 personal computers. The probability that any one of them will require repair on a given day is 0.15.
-Referring to Table 6-7, which of the following is one of the properties required so that the binomial distribution can be used to compute the probability that no more than 2 computers will require repair on a given day?
A) The number of computers that will require repair in the morning is independent of the number of computers that will require repair in the afternoon.
B) The number of personal computers the company owns on a given day is fixed.
C) The probability that two or more computers that will require repair in a given day approaches zero.
D) The probability that a computer that will require repair in the morning is the same as that in the afternoon.

Question

Quizplus · Accepted Answer

In order for the binomial distribution to be used, the number of trials (in this case, the number of personal computers) must be fixed. Option A relates to the independence of the events, which is a necessary condition for the binomial distribution, but not sufficient on its own. Option C talks about the probability approaching zero; however, this is not a requirement for using a binomial distribution. Option D relates to the probability of success being constant across all trials, which is another requirement for the binomial distribution, but it is not necessary to compute the probability that no more than 2 computers require repair.

TABLE 6-7 A Company Has 125 Personal Computers. the Probability That Any