CHS 627: Multivariate Methods in Health Statistics
SPRING, 2002

Requirements for First Statistical Analysis Report

  • Brief description of where your data came from
  • Definitions of the variables being used.
  • Two factorial ANOVAs
  • Requires a continuous outcome and two categorical predictors. 
  • Discuss the assumptions you are making and provide evidence of whether they are valid.
  • Graph main effects and interaction. Interpret the results. 
  • Include appropriate multiple comparisons if necessary.
Use the same continous outcome and the same set of two or more continuous predictors for both analyses.
  • All-inclusive multiple regression
    • Discuss results including consideration of assumptions and multicollinearity
  • Stepwise multiple regression
    • Provide a complete discussion of results at each step
  • Use one categorical predictor and one continuous predictor.

  • (Select from the most promising variables in the prior two analyses.)
  • Discuss and graph the results. 
  • Contrast your results to an ANOVA that does not use the covariate.
  • Contrast your results to a simple linear regression that only uses the covariate.
  • Repeat the ANCOVA analysis above as a GLM analysis that includes interaction.
  • Discuss and graph the results. 
  • Contrast your results to the previous analyses.
  • Discuss what did and what did not influence your outcome variable. 
  • Among the analyses conducted, which seem to be the most appropriate and useful?
  • A major proportion of your grade will depend on the accuracy, thoroughness, and clarity of your discussions.

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Last modified December 17, 2002.
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