Which of the following equalities is correct?
A)SST = SSR + SSE
B)SSR = SST + SSE
C)SSE = SSR + SST
D)SST = SSC + SSR

Question

Quizplus · Accepted Answer

In ANOVA (analysis of variance), SST (total sum of squares) is the sum of the squared differences of each value from the mean of all values. 
SSR (regression sum of squares) is the sum of the squared differences of the predicted values (from the regression equation) from the mean of all values. 
SSE (error sum of squares) is the sum of the squared differences of the observed values from the predicted values. 
Therefore, the correct equality is SST = SSR + SSE.

Which of the Following Equalities Is Correct