PSYCH 240 Study Guide - Final Guide: Standard Score, Standard Deviation, Ny1

• School: UMASS-Amherst
• Department: Psychology & Brain Sciences
• Course: PSYCH 240
• Professor: Richard Bogartz

Document Summary

All formulas said here are on the forumal sheet: hypothesis testing, proportions, null. H0: p(success) = value (such as . 5 for a coin flip) Null always has an equal sign: alternative. Ha: p(success) > value (same as null) Will always be either greater than or less than, maybe with an equal to, but never just an equal sign: observed probability is p-value (observed compared to expected) Always compare to . 05 to see how significant the test is. Bigger than . 05, we fail to reject the null. If its smaller than . 05, we can reject the null. We"re doing the same thing each time, it"s just different in context. Use not equal to in this situation. This is a two-sided test: formula sheet z test (same as z score) Z score and z value are different, they just use the same formula. Observed minus expected over (sd/ square root of sample)