TABLE 7-5
According to a survey, only 15% of customers who visited the website of a major retail store made a purchase. Random samples of size 50 are selected.
-Referring to Table 7-5, the requirements for using a normal distribution to approximate a binomial distribution is fulfilled.

Question

Quizplus · Accepted Answer

According to Table 7-5, the minimum requirements for using a normal distribution to approximate a binomial distribution are n*p and n*(1-p) both greater than or equal to 10. In this case, n=50 and p=0.15, so n*p=7.5 and n*(1-p)=42.5, which are both greater than or equal to 10. Therefore, the requirements are fulfilled and a normal distribution can be used to approximate the binomial distribution.

TABLE 7-5 According to a Survey, Only 15% of Customers Who Visited