PSYC 2002 Lecture Notes - Lecture 13: Observational Error, Massachusetts Route 2, Family-Wise Error Rate

• School: Carleton University
• Department: Psychology
• Course: PSYC 2002
• Professor: Steven Carroll

Document Summary

We were playing with this example last week The grand mean = m = x / n = 39 / 9 = 4. 33. Ms within groups is a measure of variability attributable to random error and fluctuations. Since ms between groups was generated from the same people responsible for the random error, some of ms between is also comprised of random error. Let"s use to symbolize the effect of treatment . But some of ms between can also be explained by the effect of our treatment. Theoretically, this is the lowest possible value for an f score. Consider the following anova conducted on a single factor with only two levels, a & b: A = {1, 2, 3}, b = {4, 5, 6} S( m 1 t observed = - 3. 67. Just for fun, square the t-observed t = 3. 67 = 13. 5 = f. Some anova philosophy t = f t ( ) = z.