Exam 12: Analysis of Variance

Six food critics each visited and rated four different restaurants.Each critic visited each restaurant on three separate occasions and recorded a score for each visit.The correct method for analyzing this data is two-factor ANOVA.

In conjunction with the housing foreclosure crisis of 2009,many economists expressed increasing concern about the level of credit card debt and efforts of banks to raise interest rates on these cards.The banks claimed the increases were justified.A Senate subcommittee decided to determine if the average credit card balance depends on the type of credit card used.Under consideration are Visa,MasterCard,Discover,and American Express.The sample sizes to be used for each level are 25,25,26,and 23,respectively. State the number of degrees of freedom available for determining the total variation.