Table 2.

Simple linear regression equations and model comparisons of r2

PopulationSimple linear regression modelsNP-valuer2 (SLR)r2 (2nd order)r2 difference (2nd order-SLR)
Northern (NH)CTMaxn = 28.525 + (0.410 * Acc. temp.)103<0.0010.9580.9720.014
Southern (GA)CTMaxs = 30.874 + (0.362 * Acc. temp.)102<0.0010.9350.9450.010
Northern (NH)CTMinn = −3.190 + (0.279 * Acc. temp.)100<0.0010.8580.9630.105
Southern (GA)CTMins = −3.573 + (0.349 * Acc. temp.)103<0.0010.9100.9730.063
  • Second order regressions are given in Fig. 2. Acc. temp., acclimation temperature.