condition mean min max ZT0-3 347.06938 347.06938 347.06938 ZT4-7 370.705142 370.705142 370.705142 ZT8-11 384.87299800000005 384.87299800000005 384.87299800000005 ZT12-15 374.16331049999997 374.16331049999997 374.16331049999997 ZT16-19 309.7749695 309.7749695 309.7749695 ZT20-23 335.763638 335.763638 335.763638