condition mean min max ZT0-3 38.7806 38.7806 38.7806 ZT4-7 38.7191 38.7191 38.7191 ZT8-11 39.743700000000004 39.743700000000004 39.743700000000004 ZT12-15 36.47765 36.47765 36.47765 ZT16-19 40.275549999999996 40.275549999999996 40.275549999999996 ZT20-23 34.78215 34.78215 34.78215