condition mean min max ZT0-3 29.39346 3.45187 55.33505 ZT4-7 13.74573 13.74573 13.74573 ZT8-11 48.6663 48.6663 48.6663 ZT12-15 0 0 0 ZT16-19 30.55265 30.55265 30.55265 ZT20-23 0.0 0.0 0.0