condition mean min max ZT0-3 46.746475 46.291799999999995 47.20115 ZT4-7 32.2679 32.2679 32.2679 ZT8-11 36.07155 36.07155 36.07155 ZT12-15 0 0 0 ZT16-19 38.9264 38.9264 38.9264 ZT20-23 44.0473 44.0473 44.0473