Question

Does the type of program people watch influence how much they eat? A total of 94 college students were randomly assigned to one of three treatments: watching 20 minutes of a Hollywood action movie (The Island), watching the same 20-minute excerpt of the movie with no sound, and watching 20 minutes of an interview program. While watching, participants were given snacks (MS cookies, carrots, and grapes) and allowed to eat as much as they wanted. Subjects who watched the highly stimulating excerpt from The Island ate 65% more calories than subjects who watched the interview show. Participants who watched the silent version of The Island ate 46% more calories than those who watched the interview show.

What are the explanatory and response variables? Is it
-an experiment
-or an observational study?

A)The explanatory variable is the type of program the people watched. The response variable is type of snack consumed. This was an experiment.
B)The explanatory variable is the number of calories consumed. The response variable is the type of program the people watched. This was an experiment.
C)The explanatory variable is the type of program the people watched. The response variable is the number of calories consumed. This was an experiment.
D)The explanatory variable is the type of program the people watched. The response variable is the number of calories consumed. This was an observational study.
E)The explanatory variable is the number of calories consumed. The response variable is the type of program the people watched. This was an observational study.

Answer 1

In the study, the explanatory variable is the type of program watched and the response variable is the number of calories consumed, identifying this as an experimental design.

Step-by-step explanation:

The type of program people watch can potentially influence how much they eat, as suggested by the given study. In this scenario, the explanatory variable is the type of program that the participants watched. The three treatments were watching an action movie, watching the action movie without sound, and watching an interview program.

On the other hand, the response variable is the amount of food consumed by the participants, measured in calories from snacks provided during the study. This study can be categorized as an experimental design because the researchers manipulated the independent variable (the type of program watched) and measured the effect this had on the dependent variable (number of calories consumed).