An experiment is a controlled scientific study. In statistics, we regularly conduct experiment to understand how an altering one change affects one more variable.

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Amanipulated variable is a variable the we adjust or “manipulate” to see how that change affects some other variable. A manipulated variable is likewise sometimes dubbed an independent variable.

Aresponse variable is the change that alters as a result of the manipulated variable gift changed. A solution variable is sometimes called a dependent variable since its value frequently depends top top the worth of the manipulated variable.

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Often in experiments there room alsocontrolled variables, which space variables that are intentionally kept constant.

The goal of an experiment is to save all variables continuous except for the manipulated variable so that we can attribute any change in the solution variable come the changes made in the manipulated variable.

Let’s examine out a pair examples of different experiments to acquire a far better understanding that manipulated variables.

Example 1: Free-Throw Shooting

Suppose a basketball coach desires to command an experiment to recognize if three different shooting techniques impact the free-throw percent of his players.

He divides his team into three groups and also has each team use a different technique to shoot 100 free-throws. That then documents the median free-throw portion for every group.

In this experiment, we would have the following variables:

Manipulated variable: The shoot technique. This is the variable that us manipulate to see how it affect free-throw percentage.Response variable: The free-throw percentage. This is the variable that transforms as a an outcome of the manipulated variable gift changed.Controlled variables: we would desire to make sure that every of the three groups shoot free-throws under the exact same conditions. So, variables that us might control include (1) gym lighting, (2) time of day, and also (3) gym temperature.

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Example 2: test Scores

Suppose a teacher desires to understand exactly how the variety of hours invested studying affects test scores. She intentionally has teams of students examine for 1, 2, 3, 4, or 5 hours prior to an exam. She then has each group take the same exam and records the median scores for each group.

In this experiment, we would have the adhering to variables:

Manipulated variable: The number of hours spent studying. This is the variable that the teacher manipulates to see how it affects exam scores.Response variable: The test scores. This is the change that changes as a an outcome of the manipulated variable being changed.

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Controlled variables: us would desire to make sure that every of the teams of students take it the test under the exact same conditions. So, variables that us might manage include (1) time available to complete exam, (2) number of breaks given during exam, and (3) time that day when exam is administered.

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Additional Reading

What is one Antecedent Variable?What is an Extraneous Variable?What is one Intervening Variable?What is a Confounding Variable?