![]() A simple example would be using a person's intelligence (a factor) to predict their verbal, quantitative, writing, and analytical scores on the GRE (variables).Īnalysis of variance (ANOVA) is the method used to compare continuous measurements to determine if the measurements are sampled from the same or different distributions. ANOVA and Factor Analysis in Process Controlįirst invented in the early 1900s by psychologist Charles Spearman, factor analysis is the process by which a complicated system of many variables is simplified by completely defining it with a smaller number of "factors." If these factors can be studied and determined, they can be used to predict the value of the variables in a system.Mood's Median Test for Comparing Medians.Kruskal-Wallis Test for Comparing Medians.Computing the 95% Confidence Interval for the Population Means.Setting up an Analysis of Variance Table.Comparison of Sample Means Using the F-Test.
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