condition mean min max ZT0-3 58.7258 58.7258 58.7258 ZT4-7 47.87925 47.87925 47.87925 ZT8-11 39.5102 39.5102 39.5102 ZT12-15 47.51815 47.51815 47.51815 ZT16-19 55.6311 55.6311 55.6311 ZT20-23 57.0758 57.0758 57.0758