Confirming SSR, SSE, and SST using matrix in R

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The codes below was done in our regression laboratory class. Here, we run first the data in SPSS, and take the ANOVA output where we can find the computed values of SSR, SSE, and SST.
ANOVAb
Model
Sum of Squares
df
Mean Square
F
Sig.
1
Regression
640267.552
1
640267.552
9.822
.004a
Residual
1825213.815
28
65186.208
Total
2465481.367
29
a. Predictors: (Constant), Length of Service
b. Dependent Variable: Monthly Salary

  

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