PSYC08H3 Chapter Notes - Chapter 12: Family-Wise Error Rate, Type I And Type Ii Errors, Linear Combination
Document Summary
Chapter 12 a priori comparisons error rate per comparison (pc: probability of making a type i error on any given comparison familywise error rate. 2. the probability that a family of conclusions will contain at least one type i error. 1. comparisons chosen before the data is collected post hoc comparisons: planned after the experimenter has collected the data contrasts, aka a priori comparisons multiple t- tests. 4. for contrasts to be orthogonal, the coefficients must: equal 0. 5. if you want sscontrasts to equal to sstreatment, then a. the number of comparisons must equal the number of df for treatments dunn"s test: aka bonferroni t test. 2. step 1: the first thing to do is to compute a value of t for each comparison you wish to perform. b. If that comparison is a planned t-test, then t simply equals your t obtained and has the same degrees of freedom as that t. c.
