condition mean min max ZT0-3 59.01348333333333 30.83495 110.63300000000001 ZT4-7 64.7975 64.7975 64.7975 ZT8-11 15.387999999999998 15.387999999999998 15.387999999999998 ZT12-15 13.579725 11.3533 15.806149999999999 ZT16-19 43.9216 43.9216 43.9216 ZT20-23 38.5566 38.5566 38.5566