Exhibit 10-10: Identify the Major Threat to Internal Validity in the Following

question 17

Multiple Choice

Exhibit 10-10: Identify the major threat to internal validity in the following research studies.
-Refer to Exhibit 10-10.A researcher used two classrooms in an experimental study.It was found that the E group had more high ability students than the C group before the study began.

• A) Regression
• B) Diffusion
• C) Mortality
• D) Selection bias
• E) History

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Definitions:

Variable Production Costs

Variable production costs are those costs that vary directly with the level of production output, such as raw materials and direct labor.

Traceable Fixed Advertising

Costs of advertising that can be directly associated with a specific product or segment of the business.

Fixed General Factory Overhead

Costs associated with operating a factory that do not vary with the level of production, such as factory rent, insurance, and salaries of managers.