Question

Smithers thinks that a special juice will increase the productivity of workers. He creates

Answer 1

Independent variable - juice

Dependent variable - stacks of paper made

Control - group B

Constant - Task

Research variables

In every scientific investigation, there are different variables. These include:

• Independent variables: These are the variables that are supplied by the researcher and often varied to produce different effects. It is often referred to as the 'cause' variable.
• Dependent variables: These are variables that are measured in the course of research. They are a result of the effects of the independent variable on the experimental subjects or groups. They are otherwise known as 'effect' variables.
• Constant variables: Variables that are applicable to all experimental groups and are usually kept constant.

Also, there are different groups in research:

• Control group: The reference group. The group that is not fed with the independent variable and forms the basis for comparison in order to understand the effects of the independent variable.
• The experimental group: The group that is fed with the independent variable.

More on research variables can be found here: brainly.com/question/25115889

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