Table 1 Descriptive statistical analysis for the yield of winter wheat.
Variables | Data set | Sample number | Range | Min | Max | Average | SD | Skewness | Kurtosis |
---|---|---|---|---|---|---|---|---|---|
Yield (kg·ha−1) | Calibration set | 20 | 6622.970 | 2810.680 | 9433.640 | 6093.200 | 2065.570 | 0.252 | −1.181 |
Validation set | 14 | 6428.33 | 2423.87 | 8852.200 | 4793.750 | 1696.860 | 0.895 | 1.182 |