Pearson Product-Moment Correlation Coefficient (r)

Develop practical mastery of Pearson correlation through centered sums, covariance, standard deviations and standardized scores. Examine bounds, constant inputs, affine transformations, outliers, nonlinear structure and the lesson of Anscombe’s quartet. Prerequisites: covariance and standard deviation. The set emphasizes descriptive reasoning and reproducible calculations; formal tests and vector-geometric proofs are deferred. Includes single-select and multiselect practice with worked explanations and misconception-specific feedback.

Further reading and method references:

• SciPy: Pearson correlation
• NIST: scatter plots