BIZNIQUE / LINEAR ALGEBRA / 34
A model connects assumptions to a prediction
A model connects assumptions to a prediction
Move a coefficient and inspect both the fitted line and the observations it misses.
Embedded Files
THE IDEA
Read the example.
Read the example.
A model maps inputs to outputs using a stated family of relationships. In this example the intercept is fixed at zero and the slope changes. The residuals show the discrepancies between observed and predicted values.
ŷ = wx + b
Use it well
Use it well
A good-looking fit on observed data is not an independent test of prediction. Also check assumptions, data quality, uncertainty and performance on suitable held-out cases.
TRY IT YOURSELF
A quick check.
A quick check.
If every predicted value is too high by the same amount, which part of a linear model could address that pattern?
Check your reasoning
Check your reasoning
An intercept adjustment can shift every prediction by the same amount, though the cause should still be investigated.
CONTINUE EXPLORING
Explore this topic.
Explore this topic.
Page updated
Google Sites
Report abuse