5) Amazon.com wishes to investigate the relationship between order size (in dollars) and the level of satisfaction of the customer. The chief marketing office (CMO) of Amazon.com randomly picks 30 consumers and records each customer's level of satisfaction (on a scale of 1 through 7, 7 being extremely satisfied and 1 being extremely dissatisfied) and their order size. The CMO expects that higher levels of satisfaction would lead to higher order sizes. In addition, the CMO expects the impact of satisfaction on order size to be lowered at higher levels of satisfaction. Express the model that the company must use, state the null and alternate hypothesis, estimate the model and provide interpretation. The data is in Amazon.sav. 15 points