Estimate Standard error Intercepts     α0 0.851 0.354 α1 2.863 0.293 Slopes     γ0 2.309 0.307 γ1 -3.347 0.419 Variance-covariance terms 1.369   0.687   ρ 0.935

Table 2: REML estimates of parameters in model (6) when applied to the PCR data.