TABLE 7-4
According to a survey, only 15% of customers who visited the web site of a major retail store made a purchase. Random samples of size 50 are selected.
-Referring to Table 7-4, the requirements for using a normal distribution to approximate a binomial distribution is fulfilled.

Question

Quizplus · Accepted Answer

According to Table 7-4 (which is not provided), if the sample size is at least 10 and np and n(1-p) are both greater than or equal to 10, then the requirements for using a normal distribution to approximate a binomial distribution are fulfilled. In this case, n=50 and p=0.15, so np=7.5 and n(1-p)=42.5, both of which are greater than or equal to 10. Therefore, the requirements are fulfilled and a normal distribution can be used to approximate the binomial distribution.

TABLE 7-4 According to a Survey, Only 15% of Customers Who Visited