condition mean min max ZT0-3 0.57570875 0.5204075 0.63101 ZT4-7 0.6254275 0.6254275 0.6254275 ZT8-11 0.520085 0.520085 0.520085 ZT12-15 0 0 0 ZT16-19 1.65499 1.65499 1.65499 ZT20-23 0.8336144999999999 0.8336144999999999 0.8336144999999999