condition mean min max ZT0-3 128.692683 128.692683 128.692683 ZT4-7 110.5843545 110.5843545 110.5843545 ZT8-11 170.4221415 170.4221415 170.4221415 ZT12-15 187.514946 187.514946 187.514946 ZT16-19 244.46524399999998 244.46524399999998 244.46524399999998 ZT20-23 226.540729 226.540729 226.540729