condition mean min max ZT0-3 4961.700000000001 4961.700000000001 4961.700000000001 ZT4-7 4077.0 4077.0 4077.0 ZT8-11 4495.25 4495.25 4495.25 ZT12-15 4962.6 4962.6 4962.6 ZT16-19 5734.15 5734.15 5734.15 ZT20-23 5611.049999999999 5611.049999999999 5611.049999999999