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A company was interested in learning if training expenditures will enhance its salesforce productivity, so they hired a researcher to conduct an experiment in which one group of salespeople received training and the other didn't. The average sales for salespeople who received training was significantly higher than for those who did not. This difference in means between the two groups is known as a(n) _____ effect.

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Answer:

Main effect

Explanation:

The main effect which is also called simple effect measures the impact of an independent variable on a dependent variable averaged across multiple samples in a statistical design.

In this case the dependent variables are the average sales of the two groups. The independent variable is the train that was given to the first group.

The result where the group that received training is better than the one without training, shows the training improves performance.

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