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

question 84

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:
Y = Weight-loss (in pounds)
X₁ = Length of time in weight-loss program (in months)
X₂ = 1 if morning session, 0 if not
X₃ = 1 if afternoon session, 0 if not (Base level = evening session)
Data for 12 clients on a weight-loss program at the clinic were collected and used to fit the interaction model:
Y = β₀ + β₁X₁ + β₂X₂ + β₃X₃ + β₄X₁X₂ + β₅X₁X₂ + ε
Partial output from Microsoft Excel follows:

-Referring to Table 14-11, in terms of the βs in the model, give the mean change in weight-loss (Y) for every 1 month increase in time in the program (X₁) when attending the evening session.

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

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Definitions:

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The phenomenon where the value or utility of a product or service increases as more people use it, often seen in social media platforms and online marketplaces.

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Systems where the value is assigned based on the reputation of users, often found in online platforms where contributions are judged by community feedback.

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Individuals who have grown up with access to digital technology from an early age, making them inherently comfortable with using and adapting to new digital environments.

Horizontal Revolution

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