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:

Independent Samples

Two or more groups of samples that are collected from separate populations and are not related or paired in any way.

Significance Level

The threshold below which a p-value results in the rejection of a null hypothesis, indicating statistical significance; commonly set at 0.05 or 5%.

Population Locations

Refers to the geographical distribution or positioning of individuals within a specified area.

Independent Samples

Distinct or separate groups used in an experiment or analysis, with each group having no impact on the outcomes or characteristics of the other group.