3.3 Fitting the Model: The Method of Least Squares Flashcards
what is a scatterplot
A graph of plotted points that show the relationship between two sets of data.
what are deviations?
the differences between the observed and the predicted values of y
what are the errors of prediction?
are the vertical distances between observed and predicted values of y
what are sum of the errors (SE)
sum of the errors (SE) should always equal zero
what are the sum of squares of the errors (SSE)?
It gives greater emphasis to large deviations of the points from the line, is should equal a number
what is least squares line, regression line, or least squares prediction equation?
An equation where it can be shown that there is one (and only one) line for which the SSE is a minimum.
sum of squares of residuals
Def least squares line
Formulas for the Least Squares Estimates
