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Chapter 2: Problem 33

The head of the quality control department at a printing company would like to carry out an experiment to determine which of three different glues results in the greatest binding strength. Although they are not of interest in the current investigation, other factors thought to affect binding strength are the number of pages in the book and whether the book is being bound as a paperback or a hardback. a. What is the response variable in this experiment? b. What explanatory variable will determine the experimental conditions? c. What two extraneous variables are mentioned in the problem description? Are there other extraneous variables that should be considered?

Short Answer

Expert verified
a. The response variable is the binding strength. b. The explanatory variable is the type of glue. c. The two extraneous variables are the number of pages in the book and whether the book is being bound as a paperback or a hardback.

Step by step solution

01

Identify the Response Variable

In this experiment, the response variable is the 'binding strength'. This is because it is the outcome that the experimenter is interested in and is measuring as a result of the experiment.
02

Identify the Explanatory Variable

The explanatory variable in this experiment is the 'type of glue'. This is because it is the factor that is being manipulated by the experimenter to see its impact on the binding strength.
03

Identify the Extraneous Variables

The extraneous variables mentioned in the experiment are 'number of pages in the book' and 'whether the book is being bound as a paperback or a hardback'. These are variables that are not of interest in this particular investigation but could potentially affect the outcome (binding strength). Other potential extraneous variables that may be considered include the quality or type of paper used, the temperature or humidity in the room where the binding is being performed etc.

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