Khan Academy
Khan Academy: Linear Regression and Correlation: Calculating R Squared
Video shows using a spreadsheet to demonstrate calculating the coefficient of determination or r-squared. Also explains how to interpret the value of r-squared.
Khan Academy
Khan Academy: Linear Regression and Correlation: Correlation and Causality
Video uses a real world medical article as an example to explain the difference between correlation and causation. Understanding why correlation does not imply causality (even though many in the press and some researchers often imply...
Khan Academy
Khan Academy: Introduction to Inference About Slope in Linear Regression
Introduction to sample slopes and using them to make confidence intervals or do a test about the population slope in least-squares regression.
Khan Academy
Khan Academy: Worked Example of Linear Regression Using Transformed Data
Worked example of linear regression using transformed data. Adapted from 2007 AP Statistics free response, form b, question 6, part d.
Sophia Learning
Sophia: Scatterplot: Lesson 2
This lesson will introduce scatterplots and representing multiple data sets in the same scatterplot. It is 2 of 3 in the series titled "Scatterplot."
Sophia Learning
Sophia: Scatterplot: Lesson 3
This lesson will introduce scatterplots and representing multiple data sets in the same scatterplot. It is 3 of 3 in the series titled "Scatterplot."
Sophia Learning
Sophia: Scatterplot: Lesson 1
This lesson will introduce scatterplots and representing multiple data sets in the same scatterplot. It is 1 of 3 in the series titled "Scatterplot."