condition mean min max ZT0-3 29.6436 29.6436 29.6436 ZT4-7 21.57945 21.57945 21.57945 ZT8-11 13.812349999999999 13.812349999999999 13.812349999999999 ZT12-15 17.019 17.019 17.019 ZT16-19 22.853 22.853 22.853 ZT20-23 25.7651 25.7651 25.7651