Statistical Analysis for Education and Psychology Researchers

Figure 8.5: Plot of residual vs. maths

score (explanatory variable)

The regression output produced by PROC REG for the maths data presented in Table 8.2
is shown in Figure 8.6.
Model: MODEL1
Dependent Variable: SMATHS
Analysis of Variance
Source DF Sum of Squares Mean Square F Value Prob>F
Model 1 827.76424 827.76424 32.680 0.0004
Error 8 202.63576 25.32947
C Total 9 1030.40000
Root MSE 5.03284 R-square 0.8033
Dep Mean 115.40000 Adj R-sq 0.7788
CV .4.36121
Parameter Estimates
Variable DF Parameter
Estimate

Standard Error’ T for H0:

Parameter=0

Prob>|T|

INTERCEP 1 94.668874 3.96032096 23.904 0.0001

MATHS 1 3.701987 0.64758172 5.717 0.0004

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