Stat Computing > FAQ > General

General  Frequently Asked Questions

Regression

• Why are R² and F so large for models without a constant?
• What is dummy coding?
• What is effect coding?
• What are Pseudo R-Squareds?
• How do I interpret odds ratios in logistic regression?
• How do I interpret a regression model when some variables are log transformed?
• How are the likelihood ratio, Wald, and Lagrange multiplier (score) tests different and/or similar?
• How can I compute LD50 from logit or probit?

Anova and related techniques

• How can I determine the correct error term in an anova?
• How can I understand a three-way interaction in anova?
• Why is the Mann-Whitney significant when the medians are equal?

Other statistical questions

• What's with the different formulas for kurtosis?
• What are the differences between one-tailed and two-tailed tests?
• What is the coefficient of variation?
• How is effect size used in power analysis?
• How can I detect/address spatial autocorrelation in my data?

None of the above

• How do I use Windows command line for data management?
• How do I cite web pages and programs from UCLA ATS?
• Excel Tips
• What are Las Vegas odds?

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