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Chapter 4: Q. 45 (page 262)

Snacking and TV Does the type of program people watch influence how much they eat? A total of 94college students were randomly assigned to one of three treatments: watching 20minutes of a Hollywood action movie (The Island), watching the same 20-minute excerpt of the movie with no sound, and watching 20minutes of an interview program (Charlie Rose). While watching, participants were given snacks (M&M鈥橲庐, 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 Charlie Rose. Participants who watched the silent version of The Island ate 46% more calories than those who watched Charlie Rose. Identify the explanatory and response variables in this study. Then determine if it is an experiment or an observational study. Explain your reasoning.

Short Answer

Expert verified

The research is observational. As a result, the response variable is the amount of food people eat, whereas the explanatory variable is the style of programming.

Step by step solution

01

Given information

We need to find if the given study is observational.

02

Simplify

The researchers concluded that the type of programme watch has an impact on how much they eat or don't eat in the particular study.
As a result, the particular program is the independent variable in this situation, whereas the quantity of food consumed is the dependent variable because it is reliant on the type of show individuals watch.
As a result, the response variable is the amount of food people eat, whereas the explanatory variable is the style of programming.
In addition, the researchers in the study are attempting to collect data without disturbing the scenario they are witnessing.
This is due to the fact that they do not tell individuals how much to eat or when to eat; instead, they simply observe it.
As a result, the research is observational.

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