TABLE 14-11 A Weight-Loss Clinic Wants to Use Regression Analysis to Build

Multiple Choice

TABLE 14-11
A weight-loss clinic wants to use regression analysis to build a model for weight-loss of a client (measured in pounds) . Two variables thought to affect weight loss are client's length of time on the weight loss program and time of session. These variables are described below:
Data for 12 clients on a weight-loss program at the clinic were collected and used to fit the interaction model:
Partial output from Microsoft Excel follows:
Regression Statistics
ANOVA

-Referring to Table 14-11, in terms of the β's in the model, give the average change in weight-loss (Y) for every 1 month increase in time in the program (X₁) when attending the afternoon session.

A) β₁ + β₄
B) β₁ + β₅
C) β₁
D) β₄ + β₅