Big Box Computer Store accepts three kinds of credit cards M

Big Box Computer Store accepts three kinds of credit cards: Master Card, Visa, and their own BigBox Store Card. The corporate sales manager would like to know if there is a difference in the mean amounts charged by customers on the three cards. A random sample of the amounts charged (rounded to the nearest dollar) is shown below.

Master

Card

ALL AMOUNTS IN USD

At the 0.05 significance level, can we conclude there is a difference in the mean amounts charged on the three cards?

Completely list the five steps in the testing procedure and develop an ANOVA table (include the ANOVA table in your memo). Develop a confidence interval between the Visa and store credit, Visa and Master Card, and Master Card and store credit means. State your conclusions and back them up with relevant data.

Solution