PSY 200 Study Guide - Quiz Guide: Null Hypothesis, Jury Trial, Statistical Power
Document Summary
Make a decision (reject or retain null?) The difference between a directional (one-tailed) hypothesis and a non- directional (two- tailed) hypothesis. One tailed: hypothesis look for change, differences, or relationships in a specific direction. Two tailed: hypothesis look for any change, difference, or relationship in any direction. Critical region: where the unlikely values fall in the distribution. They are bounded depending on the alpha level, 2. 5% region. Kno(cid:405) the jury trial" hypothesis testing analogy. Trial begins with the null hypothesis (cid:817)not guilty(cid:818) With sufficient evidence against, jury rejects null hypothesis and concludes (cid:817)guilty(cid:818) With insufficient evidence against, jury fails to reject the (cid:817)not guilty(cid:818) retain the null. If p is less than alpha, reject the null. If p is higher than alpha, retain the null. The difference between type i and type ii error and what determines each one. Type i: (cid:817)false positi(cid:404)e(cid:818) researcher rejects the null hypothesis (cid:405)hen they should have retained it.
