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Please select one or more subjects to test your stat skills, and click the Submit button to continue.

When checked, overview questions spanning multiple subjects (e.g., about test selection) may be included in the practice session depending on your selection from the selection menu below. When unchecked any overview questions will be omitted from the practice session.
• Inference for proportions
• Binomial test for a single proportion
• Significance test (Binomial test for a single proportion)
• z test for a single proportion
• Tests and confidence intervals (z test for a single proportion)
• z test for the difference between two proportions
• Tests and confidence intervals (z test for the difference between two proportions)
• Chi squared test
• Goodness of fit test
• Significance tests (Goodness of fit test)
• Chi-squared test for the relationship between two categorical variables
• Significance tests (Chi-squared test for the relationship between two categorical variables)
• z test
• One sample z test for the mean
• Tests and confidence intervals (One sample z test for the mean)
• Power, Type I and Type II errors (One sample z test for the mean)
• Two sample z test
• Tests and confidence intervals (Two sample z test)
• t test
• One sample t test for the mean
• Tests and confidence intervals (One sample t test for the mean)
• Paired sample t test
• Tests and confidence intervals (Paired sample t test)
• Two sample t test: equal variances not assumed
• Assumptions (Two sample t test: equal variances not assumed)
• Tests and confidence intervals (Two sample t test: equal variances not assumed)
• Two sample t test: equal variances assumed
• Assumptions (Two sample t test: equal variances assumed)
• Tests and confidence intervals (Two sample t test: equal variances assumed)
• ANOVA
• One way ANOVA
• Assumptions (One way ANOVA)
• Null and alternative hypothesis (One way ANOVA)
• Sum of squares and degrees of freedom (One way ANOVA)
• F statistic and p value (One way ANOVA)
• ANOVA table (One way ANOVA)
• Eta and omega squared (One way ANOVA)
• Confidence interval for single population mean (One way ANOVA)
• Contrasts (One way ANOVA)
• Multiple comparisons / post hoc tests (One way ANOVA)
• Two way ANOVA
• Main and Interaction Effects (Two way ANOVA)
• ANOVA table (Two way ANOVA)
• Eta, partial eta, and omega squared (Two way ANOVA)
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• Regression analysis
• Regression (OLS)
• Assumptions (Regression (OLS))
• Regression equation - one independent variable (Regression (OLS))
• Regression equation - several independent variables (Regression (OLS))
• Sum of squares and degrees of freedom (Regression (OLS))
• ANOVA table (Regression (OLS))
• R squared (Regression (OLS))
• Partial and semi-partial correlation (Regression (OLS))
• Tests and confidence intervals for regression coefficients (Regression (OLS))
• Confidence and prediction intervals for mean response and future observation (Regression (OLS))
• Multicollinearity (Regression (OLS))
• Outliers and influential points (Regression (OLS))
• Code variables (Regression (OLS))
• Moderator analysis: interactions between continuous independent variables (Regression (OLS))
• Hierarchical regression (Regression (OLS))
• Logistic regression
• Regression equation (Logistic regression)
• Classification tables (Logistic regression)
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• ANCOVA
• ANCOVA
• ANCOVA vs ANOVA and regression (ANCOVA)
• Sum of squares and degrees of freedom (ANCOVA)
• Assumptions (ANCOVA)
• Correlation
• Pearson correlation
• Properties (Pearson correlation)
• Tests and confidence intervals (Pearson correlation)
• Spearman's rho
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• Non parametric
• Mann-Whitney-Wilcoxon test
• Significance tests based on Wilcoxon rank sum statistic W (Mann-Whitney-Wilcoxon test)
• Kruskal-Wallis test
• Significance tests (Kruskal-Wallis test)
• Sign test
• Significance test (Sign test)
• McNemar's test
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• Cochran's test
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• Marginal Homogeneity test / Stuart-Maxwell test
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• Wilcoxon signed-rank test
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• One sample Wilcoxon signed-rank test
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• Friedman test
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