Which of the Following Is Implemented in an Experiment to Reduce

question 18

Multiple Choice

Which of the following is implemented in an experiment to reduce known sources of natural variability in the response variable, so that differences due to the explanatory variable can be detected more easily?

• A)Matched-pairs
• B)Repeated measures
• C)Blocks
• D)All of the above

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Definitions:

Marginal Mean

The mean of the subset of observations that contribute to the marginal total, providing insight into specific group effects within a larger dataset.

Factorial Designs

Experimental designs used to evaluate the effects of two or more factors by varying them simultaneously and systematically.

Interaction Effects

A statistical concept where the effect of one independent variable on the dependent variable differs across the levels of another independent variable.

Independent Variables

Factors in an experiment that are manipulated to determine if they cause a change in the dependent variable.