Explain Why the Presence of an Uncontrolled Extraneous Variable (I

question 25

Essay

Explain why the presence of an uncontrolled extraneous variable (i.e., a confound) makes it impossible to interpret the results of a study.

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Definitions:

Milligram

A unit of mass equal to one thousandth of a gram, often used in medicine to specify drug dosages.

Grain

A unit of measure traditionally used in pharmacology and jewelry, equal to approximately 0.065 grams.

Milligram

A unit of mass equal to one thousandth of a gram.

Gram

A measure of mass that corresponds to 1/1000th of a kilogram.