condition mean min max ZT0-3 29.11375 29.11375 29.11375 ZT4-7 20.295650000000002 20.295650000000002 20.295650000000002 ZT8-11 20.584400000000002 20.584400000000002 20.584400000000002 ZT12-15 15.84555 15.84555 15.84555 ZT16-19 31.352800000000002 31.352800000000002 31.352800000000002 ZT20-23 26.35895 26.35895 26.35895