condition mean min max ZT0-3 176.11 108.4175 294.52250000000004 ZT4-7 156.247 156.247 156.247 ZT8-11 53.787549999999996 53.787549999999996 53.787549999999996 ZT12-15 76.41547500000001 66.71475000000001 86.1162 ZT16-19 39.94365 39.94365 39.94365 ZT20-23 51.53715 51.53715 51.53715