condition mean min max ZT0-3 7.010012499999999 5.8025649999999995 8.217459999999999 ZT4-7 8.20046 8.20046 8.20046 ZT8-11 13.683399999999999 13.683399999999999 13.683399999999999 ZT12-15 0 0 0 ZT16-19 17.86955 17.86955 17.86955 ZT20-23 9.468275 9.468275 9.468275