condition mean min max ZT0-3 56.997245 56.997245 56.997245 ZT4-7 87.21451400000001 87.21451400000001 87.21451400000001 ZT8-11 55.7933285 55.7933285 55.7933285 ZT12-15 49.86546 49.86546 49.86546 ZT16-19 35.831017 35.831017 35.831017 ZT20-23 40.0449845 40.0449845 40.0449845