Lesson 12: Simple Regression and ANOVA

Lesson 12: Simple Regression and ANOVA

For this lesson we will be working with the HELP dataset. See more details on the HELP dataset at:

• https://github.com/melindahiggins2000/N736Fall2017_HELPdataset
• https://melindahiggins2000.github.io/N736Fall2017_HELPdataset/

Variables in HELP

{remember to review the HELP documentation}

OUTCOME - For today’s exercise, we will focus on the total score from the “Inventory of Drug Use Consequences”, which is variable indtot.

Learn more about this survey tool at:

• http://lib.adai.washington.edu/dbtw-wpd/exec/dbtwpub.dll?BU=http%3A//lib.adai.washington.edu/instrumentsearch.htm&TN=Instruments&CS=0&QY=find%20(AccessNo%20ct%20143)&RF=Full&DF=Full&MR=&NP=3&RL=0&DL=0&XC=&ID=&AC=QBE_QUERY

CONTINUOUS “predictor” - for the simple linear regression we will use the CESD (depression) score, variable cesd.

GROUP/“Factor” - for the one-way ANOVA we will create 3 groups (low, moderate and high) from the PSS-fr (perceived social support from friends scale) using “cutpoints” defined by thirds (33rd and 67th percentiles), variable pss_fr.

Data and Code for Today

• HELP Dataset for R and SPSS https://github.com/melindahiggins2000/N736Fall2017_lesson12/raw/master/helpmkh.sav
• HELP Dataset for SAS https://github.com/melindahiggins2000/N736Fall2017_lesson12/raw/master/helpmkh.sas7bdat
• HELP Formats for SAS https://github.com/melindahiggins2000/N736Fall2017_lesson12/raw/master/formats.sas7bcat
• R Program https://github.com/melindahiggins2000/N736Fall2017_lesson12/raw/master/lesson12.R
• SAS Program https://github.com/melindahiggins2000/N736Fall2017_lesson12/raw/master/lesson12all.sas
• SPSS Program (Syntax) https://github.com/melindahiggins2000/N736Fall2017_lesson12/raw/master/Lesson_12_SPSSSyntax.sps

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