Exploratory Data Analysis

Install R and Rcmdr.
Refer to R Commander Installation Notes for details: http://socserv.socsci.mcmaster.ca/jfox/Misc/Rcmdr/installation-notes.html
Import the data:
- In Rcmdr. under “Data” menu “Import data” from “text file”
- Set the “Field Separator” to “Commas”.
- Navigate to the CSV file and select it.
- Click the “Edit data set” button to open the data set in a window.
- Make a note of all outliers (to put in the legend of the figure).
- Click on the number of each row with an outlier, then right-click and “Delete current row”.
- Click OK to save edited data set.
Under “Graphs” choose “Scatterplot matrix...”
- Select all three variables.
- Click “Plot by groups”, select Gender, and click OK.
- Click “Options” and select the checkbox for Least-squares line and click OK.
- Check for outliers and repeat as necessary.
Each student independently choose one pair of variables to report in a scatter plot
- Choose independent and dependent variables
- Click “Plot by groups”, select Sex, and click OK.
- Click “Options” and select the checkbox for Least-squares line and click OK.
- Save as PDF (use this for posters)
- Convert to PNG (use this to post at website)
- Post as Image: write legend that includes title, description, and reports outliers.
- (If time available, report relevant statistics, e.g. means, linear regression, or one-way ANOVA)

You are here