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Option A is absolutely the worst choice. The non-responders have already selected themselves into a non-random set, and making a request to them alters the enti
by aj7 4y ago
Option A is absolutely the worst choice. The non-responders have already selected themselves into a non-random set, and making a request to them alters the entire experiment.
- pdonis 4y ago> The non-responders have already selected themselves into a non-random set, and making a request to them alters the entire experiment. This is a better statement than any of mine of the point I've been trying to make.