The linear correlation coefficient value in this case is 0.7473. It is shows that a strong linear
relationship between solar radiation and air temperature. This is because the solar radiation and air
temperature is directly proportional. The analysis of variance for this model 5585 0 2
.R = ; that is, about
56 percent of the variability in temperature is accounted for by the straight-line fit to solar radiation.
3.2 Measure of Model Adequacy
To diagnostic and checking the adequacy of the model, the assumption of the regression analysis are
studied. The residual analysis have defined as