condition mean min max ZT0-3 55.022999999999996 52.8321 57.213899999999995 ZT4-7 38.6854 38.6854 38.6854 ZT8-11 38.70015 38.70015 38.70015 ZT12-15 0 0 0 ZT16-19 60.69775 60.69775 60.69775 ZT20-23 52.067099999999996 52.067099999999996 52.067099999999996