4 ms·
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.
- quickthrower2 4y agoSurely the responders are also self selected into a non random set too?
- aj7 4y agoThe set you wanted, so IN the experimental design. Or did the experiment include also begging people to fill out a questionnaire they had initially trashed? Many people appear to think so.