condition mean min max ZT0-3 63.19691666666667 29.120199999999997 83.1461 ZT4-7 50.5129 50.5129 50.5129 ZT8-11 72.0007 72.0007 72.0007 ZT12-15 63.05672499999999 53.740899999999996 72.37254999999999 ZT16-19 94.1402 94.1402 94.1402 ZT20-23 124.11055 124.11055 124.11055