condition mean min max ZT0-3 0.2066985 0.2066985 0.2066985 ZT4-7 0.14788600000000002 0.14788600000000002 0.14788600000000002 ZT8-11 0.057725399999999996 0.057725399999999996 0.057725399999999996 ZT12-15 0.1798745 0.1798745 0.1798745 ZT16-19 0.8729725 0.8729725 0.8729725 ZT20-23 0.5565215 0.5565215 0.5565215