Frequently Asked Questions
What is linear regression?
A method to fit a straight line through paired (x, y) data by minimizing the squared vertical residuals. Outputs the slope and intercept of that line.
What's R²?
The coefficient of determination - the fraction of y-variance explained by the linear model. Ranges 0 to 1 in simple regression.
What's the standard error of slope?
An estimate of how precisely the slope is determined. Smaller is more precise. Used to test if the slope differs from zero.
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