Evaluating Operational Definitions When an Experimenter Fails to Randomly Assign

question 49

Multiple Choice

Evaluating Operational Definitions When an experimenter fails to randomly assign subjects to different experimental conditions, a ____ threat is present since treatment groups may differ on subject variables.

• A)selection
• B)statistical regression
• C)subject mortality
• D)testing

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Definitions:

Greatest Common Factor

The largest number that divides two or more numbers without leaving a remainder, used in simplifying fractions.

Numerator

The top number in a fraction that indicates how many parts of a whole are taken.

Denominator

The bottom number in a fraction, representing the total number of parts the whole is divided into.

Systolic Blood Pressure

The highest pressure in the arteries when the heart beats, indicating the force at which blood is pumped around the body.