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Simple Linear Regression
A visual, step-by-step guide to ordinary least squares
Statistics 5 chapters · ~15 min
1
The Data and the Question
Meet the dataset and try to find the pattern
2
Measuring the Errors
How do we know if a line is good or bad?
3
The OLS Solution
Step-by-step hand calculation of the best line
4
Evaluating the Model Fit
TSS, SSR, SSE, R², and making predictions
5
Can We Trust the Estimates?
Standard errors, t-tests, and confidence intervals