The Best-Fitting Line

Explore regression lines and how to measure the accuracy of a regression line.

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Regression lines are also known as best-fitting lines. What do we mean by best? Let’s explore the criteria that’s used in regression to determine the concept of best. Recall that, for an instructor with a beauty score of𝑥=7.333𝑥 = 7.333, we mark the observed value yy with a circle, the fitted value y^\hat y ...