Section 5
R.M.S. Error for Regression
Book
Version 1
By Boundless
By Boundless
Boundless Statistics
Statistics
by Boundless
3 concepts
Computing R.M.S. Error
RMS error measures the differences between values predicted by a model or an estimator and the values actually observed.
![Thumbnail](../../../../../../figures.boundless-cdn.com/18187/square/high-residual.jpeg)
Plotting the Residuals
The residual plot illustrates how far away each of the values on the graph is from the expected value (the value on the line).
![Thumbnail](../../../../../../figures.boundless-cdn.com/18189/square/5-regressionassumptions-1c.jpg)
Homogeneity and Heterogeneity
By drawing vertical strips on a scatter plot and analyzing the spread of the resulting new data sets, we are able to judge degree of homoscedasticity.