condition mean min max ZT0-3 0.3338075 0.3338075 0.3338075 ZT4-7 0.8561734999999999 0.8561734999999999 0.8561734999999999 ZT8-11 0.3492675 0.3492675 0.3492675 ZT12-15 0.767823 0.767823 0.767823 ZT16-19 0.585933 0.585933 0.585933 ZT20-23 0.608588 0.608588 0.608588