condition mean min max ZT0-3 96.0736 96.0736 96.0736 ZT4-7 72.61635 72.61635 72.61635 ZT8-11 79.03165 79.03165 79.03165 ZT12-15 87.47495 87.47495 87.47495 ZT16-19 82.87095 82.87095 82.87095 ZT20-23 94.60061666666667 94.60061666666667 94.60061666666667