what predictor variable best represents customer loyalty what type of variables are in market research how to test which combination of product attributes generates better sales performance? which combination of product attributes produces better sales performance how to test which combination of product attributes generates better sales performance? what is the best method to measure sales performance how to test which combination of product attributes generates better sales performance? what is the best combination of sales and predictor variables to test a product? how to find out which combination of product attributes generates better sales performance? what is best approach to determine customer attributes what is the best combination of product attributes why are customer attributes important what is the best way to test for an online vacation rental company which product attributes generate better sales performance? how to test which combination of product attributes generates better sales performance? which combination of product attributes produces better sales performance? how to determine which product attributes generate better sales performance? what is the best predictor variable in predicting sales performance? how to analyze the sales performance of a vacation home does the price of vacation houses depend on the predictor variable