Any Bias in Selecting Subjects for an Experiment Threatens the _____________

question 49

Multiple Choice

Any bias in selecting subjects for an experiment threatens the _____________ of the experiment.

• A) internal validity
• B) internal reliability
• C) statistical validity
• D) statistical reliability

Calculate earnings from piece-rate and commission-based work.

Understand and perform percentage calculations for various scenarios.

Calculate average costs and weighted averages in financial transactions.

Understand the calculation and interpretation of gross earnings.

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Definitions:

Marginal Mean

The average of values in a row or column of a contingency table, which represents the mean of a variable while controlling for another variable.

Main Effect

The direct influence of an independent variable on a dependent variable in an experiment, disregarding the effects of or interactions with other variables.

Day of Week

Indicates one of the seven named divisions in a week, ranging from Sunday to Saturday.

Interaction Effect

In statistics, it refers to a situation in which the effect of one independent variable on a dependent variable changes depending on the level of another independent variable.