# Question

Recent statistics suggest that 15% of those who visit a retail site on the World Wide Web make a purchase. A retailer wished to verify this claim. To do so, she selected a sample of

16 “hits” to her site and found that 4 had actually made a purchase.

a. What is the likelihood of exactly four purchases?

b. How many purchases should she expect?

c. What is the likelihood that four or more “hits” result in a purchase?

16 “hits” to her site and found that 4 had actually made a purchase.

a. What is the likelihood of exactly four purchases?

b. How many purchases should she expect?

c. What is the likelihood that four or more “hits” result in a purchase?

## Answer to relevant Questions

In Chapter 19, we discuss acceptance sampling. Acceptance sampling is a statistical method used to monitor the quality of purchased parts and components. To ensure the quality of incoming parts, a purchaser or manufacturer ...The law firm of Hagel and Hagel is located in downtown Cincinnati. There are 10 partners in the firm; 7 live in Ohio and 3 in northern Kentucky. Ms. Wendy Hagel, the managing partner, wants to appoint a committee of 3 ...Recent crime reports indicate that 3.1 motor vehicle thefts occur each minute in the United States. Assume that the distribution of thefts per minute can be approximated by the Poisson probability distribution.a. Calculate ...A uniform distribution is defined over the interval from 2 to 5.a. What are the values for a and b?b. What is the mean of this uniform distribution?c. What is the standard deviation?d. Show that the total area is 1.00.e. ...A recent study of the hourly wages of maintenance crew members for major airlines showed that the mean hourly salary was $20.50, with a standard deviation of $3.50. Assume the distribution of hourly wages follows the normal ...Post your question

0