condition mean min max ZT0-3 0.8408305 0.8408305 0.8408305 ZT4-7 0.9243315 0.9243315 0.9243315 ZT8-11 0.854859 0.854859 0.854859 ZT12-15 0.7792465 0.7792465 0.7792465 ZT16-19 1.0477319999999999 1.0477319999999999 1.0477319999999999 ZT20-23 1.1580599999999999 1.1580599999999999 1.1580599999999999