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15 Examples 252ltage example 5−3−6 from the GENSTAT REML manual Residuals vs Fitted valuResiduals (Y) −1.08: 1.45 Fitted values (X) 15.56: 16.81Figure 15.2 Residual plot for the voltage dataof the variance parameters. These Comp/SE statistics cannot be used to test thenull hypothesis that the variance component is zero. If we had used this crudemeasure then the conclusions would have been inconsistent with the conclusionsobtained from the REML log-likelihood ratio (see Table 15.3).Source Model terms Gamma Component Comp/SE % Csetstat 10 10 0.233417 0.119370E-01 1.35 0 Psetstat.regulatr 80 64 0.601817 0.307771E-01 3.64 0 Pteststat 4 4 0.642752E-01 0.328705E-02 0.98 0 PVariance 256 255 1.00000 0.511402E-01 9.72 0 PTable 15.3: REML log-likelihood ratio for the variance components in the voltagedataREML −2×terms log-likelihood difference P-value− setstat 200.31 5.864 .0077− setstat.regulatr 184.15 38.19 .0000− teststat 199.71 7.064 .0039