Statistics · Module 11 · Correlation and linear regression

Regression Walkthrough

Watch points land on a scatterplot, see the correlation r built from z-scores, and watch the least squares line settle where the residual squares are smallest. Then learn to interpret, predict, check the fit and test the slope. Go at your own pace. Nothing here is graded.

Speed

Think of it like this

Quick check

Wrong answers are fine here. Read why, then try again.

Dr. Akash Garg · Statistics Study Tools · CC BY-NC-SA 4.0
Use the left and right arrow keys to move between steps. Practice next in the Regression Lab. All data sets are made-up practice numbers. Standard deviations use n − 1. Blue dots are data, the orange line is the least squares line, purple squares are squared residuals and red dashes are residuals.