condition mean min max ZT0-3 0.9981114999999999 0.876333 1.1198899999999998 ZT4-7 0.8599559999999999 0.8599559999999999 0.8599559999999999 ZT8-11 0.7809919999999999 0.7809919999999999 0.7809919999999999 ZT12-15 0 0 0 ZT16-19 1.095445 1.095445 1.095445 ZT20-23 1.0148835 1.0148835 1.0148835