A Professor Conducts a Study on Tipping Behavior in Restaurants

question 10

Multiple Choice

A professor conducts a study on tipping behavior in restaurants and hotels, which is designed to determine whether factors such as posture and communication influence tips left by customers. He conducts this study based on his experience in working at a restaurant as a youth. From this scenario, it can be inferred that the initial idea for the professor's study stems from:

• A)past research.
• B)his common sense and intuition or gut feeling.
• C)a scientific theory.
• D)his observation of an actual event.

Understanding the concept and application of dummy variables in regression models.

Interpreting the adjusted multiple coefficient of determination in the context of regression analysis.

Grasping the assumptions regarding the error term in multiple regression models.

Identifying the components and structure of a multiple regression model.

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Definitions:

Hindsight Bias

The tendency to believe, after learning an outcome, that we would have foreseen it. (Also known as the I-knew-it-all-along phenomenon.)

Double-Blind Procedure

An experimental procedure in which both the research participants and the research staff are ignorant (blind) about whether the research participants have received the treatment or a placebo. Commonly used in drug-evaluation studies.

Placebo Effect

Experimental results caused by expectations alone; any effect on behavior caused by the administration of an inert substance or condition, which the recipient assumes is an active agent.

Overconfidence

The tendency to be more confident than correct—to overestimate the accuracy of our beliefs and judgments.