condition mean min max ZT0-3 42.617975 38.12475 47.1112 ZT4-7 44.7577 44.7577 44.7577 ZT8-11 51.756 51.756 51.756 ZT12-15 0 0 0 ZT16-19 60.92075 60.92075 60.92075 ZT20-23 38.551100000000005 38.551100000000005 38.551100000000005