condition mean min max ZT0-3 142.55431666666667 101.28845000000001 204.02499999999998 ZT4-7 388.5045 388.5045 388.5045 ZT8-11 912.253 912.253 912.253 ZT12-15 754.9155000000001 678.849 830.982 ZT16-19 622.226 622.226 622.226 ZT20-23 440.741 440.741 440.741