Observational Study vs....

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AP Stats October 10, 2017

4.2 Experiments

Observational Study vs. Experiment

Well-designed experiments take steps to prevent confounding.

The Language of Experiments How to Experiment Well

The remedy for confounding is to perform a comparative experiment in which some units receive one treatment and similar units receive another. Most well designed experiments compare two or more treatments.

Principles of Experimental Design

AP Stats October 10, 2017

Experiments: What Can Go Wrong? Inference for Experiments

BlockingMatched Pairs Design