condition mean min max ZT0-3 28.073 27.04615 29.09985 ZT4-7 26.0 26.0 26.0 ZT8-11 29.69055 29.69055 29.69055 ZT12-15 0 0 0 ZT16-19 35.6491 35.6491 35.6491 ZT20-23 28.5372 28.5372 28.5372