condition mean min max ZT0-3 0.8447061666666666 0.5697195 0.9898935 ZT4-7 0.7982144999999999 0.7982144999999999 0.7982144999999999 ZT8-11 4.696015 4.696015 4.696015 ZT12-15 3.129795 2.3050100000000002 3.95458 ZT16-19 3.02256 3.02256 3.02256 ZT20-23 1.034197 1.034197 1.034197