SOC210 Lecture 11: ANOVA
12 May 2017
School
Department
Course
Professor
Document Summary
Soc 210 lecture 11 anova x - / ( / 1/2) Used in situation where the researcher is interested in the difference in means across three or more categories. Students taking introductory biology at a university were randomly assigned to one of three sections taught by different methods: traditional lecture-lab method, all-lab method, videotaped lectures and labs method. Collect random sample of final scores by teaching method. Consistent with null hypothesis of no difference. Level of measurement = interval ratio (outcome) Ho: 1= 2= 3= k (all population means are the same) H1: at least one population mean is different. Anova is a statistical procedure for analyzing the amount of variance that is contributed to a sample by different factors. Relies on the sum of squares, where . Total sum of squares (sst) = sum of squares within (ssw) + sum of squares between (ssb)
