All of the Following Are Possible Threats to Internal Experimental

question 1

Multiple Choice

All of the following are possible threats to internal experimental validity EXCEPT:

• A)mortality.
• B)external validity.
• C)history.
• D)maturation.
• E)testing effects.

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Definitions:

Mixed Cost

A cost that contains a combination of fixed and variable components and changes in total with the level of output or activity.

Step-Wise Cost

Costs that remain fixed for certain levels of production but can change to a different fixed rate when production levels increase or decrease.

Least-Squares Regression

A statistical method used to determine the line of best fit by minimizing the sum of squares of the differences between observed and predicted values.

Relevant Range

Pertains to the bounds within which assumptions about fixed and variable costs in relation to business activities are considered accurate.