Correlation
Content for Tuesday, March 2, 2027
Goals
By the end of this topic, you should be able to:
- Read direction, form and consistency from a scatter plot
- Compute r by hand, and test it
- Say why a correlation doesn’t name a cause
- Spot a restricted range and an outlier
Reading
- Sections 14-1 to 14-4. Skim 14-5: we cover Spearman, point-biserial and phi as ideas, without the calculations.