condition mean min max ZT0-3 1.2125650000000001 1.2125650000000001 1.2125650000000001 ZT4-7 0.693809 0.693809 0.693809 ZT8-11 1.486605 1.486605 1.486605 ZT12-15 1.43182 1.43182 1.43182 ZT16-19 2.33622 2.33622 2.33622 ZT20-23 0.9973585 0.9973585 0.9973585