PSYO 2000 Lecture Notes - Lecture 12: Chi-Squared Distribution, Poisson Distribution, Melatonin

• School: Dalhousie University
• Department: Psychology
• Course: PSYO 2000
• Professor: Simon Gadbois

Document Summary

Within is attached to a t test, there are two groups, you would use a within subject test. Problem with within subject designs: the subject goes through all of the conditions. If you start with one condition, then gets to the other, it may have an effect. Often in these design you have control for orders, half will do condition a then b, the other half will do condition b than a. When you have factorial and mixed, you are comparing more than two groups, you use anova. T tests are good as parametric tests (tests that you would use if the distribution of your data follows a normal distribution) Posssion distribution is non parametric, it doesn"t assume a normal distribution, they are simpler (counts) Descriptive statistics (important underlined) : describing the. Measures of central tendency: arithmetic mean, ((average), harmonic mean, geometric mean, mode, median.