A conclusion based on observation or evidence.

An untested prediction.

What is seen or measured.

A broad explanation of natural events that is supported by strong evidence.

Compares the results of an experiment between two (or more) groups.

Group being tested or receiving treatment. (ex: new drug).

“Normal” group. Should be identical to experimental group in every wayexcept one: it does not receive the treatment (i.e.: no drug, or given the original drug or a

A sugar pill or other “fake” treatment give to the control group so subjects do not receive the treatment (i.e.: no drug, or given the original drug or a

Variable that is being tested (ex: new drug). In a graph the independent variable is always plotted on the X axis.

Variable that is measured at the end of an experiment; the results (ex: does patient get better?) The dependent variable is always plotted on the Y axis.

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