condition mean min max ZT0-3 146.02578 146.02578 146.02578 ZT4-7 228.0792275 228.0792275 228.0792275 ZT8-11 211.60906549999999 211.60906549999999 211.60906549999999 ZT12-15 156.2402515 156.2402515 156.2402515 ZT16-19 120.1812435 120.1812435 120.1812435 ZT20-23 55.0096475 55.0096475 55.0096475