Why Do Researchers Use Random Assignment in an Experiment

question 41

Multiple Choice

Why do researchers use random assignment in an experiment?

• A) to provide ethical reasons for being in an experiment
• B) to prevent subjects from knowing which experimental group they are a member of
• C) to cause a selection factor to determine how the subjects will behave in the experiment
• D) to ensure that no pre-existing differences among groups cause the change in the experimental group's behaviour

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Definitions:

Average Variable Cost

The cost that varies with the level of output, divided by the total quantity of output produced, reflecting the average cost per unit of variable expenses.

Average Fixed Cost

The fixed costs of production divided by the quantity of output produced, indicating the cost per unit.

Average Total Cost

The total of all costs (fixed and variable) divided by the total output produced, representing the per-unit cost on average.

Contribution Format

A type of income statement where fixed and variable costs are separated to calculate contribution margin.