condition mean min max ZT0-3 34.397225000000006 26.4403 42.354150000000004 ZT4-7 13.127740000000001 13.127740000000001 13.127740000000001 ZT8-11 34.03125 34.03125 34.03125 ZT12-15 0 0 0 ZT16-19 28.149549999999998 28.149549999999998 28.149549999999998 ZT20-23 39.18775 39.18775 39.18775