condition mean min max ZT0-3 1.22066 1.22066 1.22066 ZT4-7 0.7307714999999999 0.7307714999999999 0.7307714999999999 ZT8-11 1.128525 1.128525 1.128525 ZT12-15 0.8146035 0.8146035 0.8146035 ZT16-19 1.53842 1.53842 1.53842 ZT20-23 1.373465 1.373465 1.373465