Statistical Selection Chart

For 2 samples ASK You say you want to compare! How many samples? Are my samples related? OR Are they independent?

For Class A Data USE For related samples ASK What is the level of measurement? For Class B Data USE For Class C Data USE T-Test for Correlated Sample Wilcoxen Matched-Pairs Signed-Ranks Test McNemar Test for Significance of Changes

For Class A Data USE For independent samples ASK What is the level of measurement? For Class B Data USE For Class C Data USE T-Test for Separate Group or Pooled Variance Mann-Whitney U-Test Chi-Square Test

For k > 2 samples ASK You say you want to compare! How many samples? Within which measurement level does my data fall?

For Class A Data USE Analysis of Variance (ANOVA)

For Related Samples USE For Class B Data ASK Are my samples related or independent? For Independent Samples USE Friedman Two-Way Analysis of Variance Kruskal-Wallis One- Way Analysis of Variance

For Class C Data ASK Are my samples related or independent? For Related Samples USE For Independent Samples USE Cochran Q-Test Chi-Square Test For Related Samples USE For Independent Samples USE

For 2 variables ASK You say you want relate! How many variables? What is the level of measurement?

For Class A Data USE Pearson Product-Moment Coefficient of Correlation (r)

For Class B Data USE Spearman Rank-Order Coefficient of Correlation (rho) OR Kendall Rank Correlation (Tau)

For Class C Data USE Contingency Coefficient (C)

For Mixed Data USE Biserial Correlation Spearman rho or Kendall Tau If one is Class A and one is Class C USE If mixed Class A and B, convert Class A to B -USE

For K variables ASK You say you want relate! How many variables? What is the level of measurement?

For Class A Data USE Multiple Regression Analysis

For Class B Data USE Kendall Partial Rank-Correlation

For Class C Data USE Discriminate Analysis

You say you want describe! Just One Question... What is the level of measurement?

For Class A Data USE Mean and Variance or Standard Deviation

For Class B Data USE Median and Range

For Class C Data USE Mode