condition mean min max ZT0-3 93.539783 93.539783 93.539783 ZT4-7 83.80081999999999 83.80081999999999 83.80081999999999 ZT8-11 94.43279899999999 94.43279899999999 94.43279899999999 ZT12-15 92.098196 92.098196 92.098196 ZT16-19 111.3445595 111.3445595 111.3445595 ZT20-23 124.4320715 124.4320715 124.4320715