An Experimental Study Is Conducted Examining the Relationship Between Drinking

question 84

Multiple Choice

An experimental study is conducted examining the relationship between drinking caffeine and reaction time.Participants given caffeine by the experimenters in different amounts,and then are assessed on various tests of reaction time.In this study,the amount of caffeine that a participant drinks is the ____.

• A)random variable
• B)independent variable
• C)dependent variable
• D)control variable

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Definitions:

Variable

Any characteristic, number, or quantity that can be measured or counted; a variable may vary from one observation to another.

Subscript D

Represents a variable or an element in a sequence, denoted with a letter "D" in a subscript position to indicate a specific instance or version of the variable.

Degrees Of Freedom

The number of independent values or quantities that can vary in the analysis of statistical parameters.

Matched Pairs Experiment

An experimental design in which subjects are paired based on similarity in one or more characteristics, with one member of each pair receiving the treatment and the other serving as a control.