Chapter 10 Flashcards
analysis of variance (ANOVA)
a family of statistical tests for comparing the means of two or more groups.
between-group variability
variability in scores that is primarily due to the different treatments that different groups receive.
between subjects
ANOVA terminology for independent samples.
between-subjects, one-way ANOVA
a statistical test used to compare the means of two or more independent samples when there is just one explanatory variable.
factor
term for an explanatory variable in ANOVA.
level
ANOVA terminology for a category of an explanatory variable.
post-hoc test
a follow-up test to a statistically significant ANOVA, engineered to find out which pairs of means differ while keeping the overall alpha level at the chosen level.
sum of squares between (SSBetween)
a sum of the squared deviation scores representing the variability between groups.
sum of squares total (SSTotal)
a sum of the squared deviation scores representing all the variability in the scores.
sum of squares within (SSWithin)
a sum of the squared deviation scores representing the variability within groups.
treatment effect
the impact of the explanatory variable on the dependent variable.
way
term for an explanatory variable in ANOVA.
within-group variability
variability within a sample of cases, all of which have received the same treatment.
