You have been hired as a marketing research analyst by Yili China’s very first fast-food restaurant. Your boss, the marketing manager, wants to know how you would measure the relationship between price and sales using a product moment correlation coefficient. The marketing manager believes that it will help explain the patronage of Yili in terms of the consumers’ evaluations of the business based on the factors of consumers’ choice of bakery products. Explain to your boss (a student in your class) the value of the product moment correlation coefficient approach.