condition mean min max ZT0-3 46.95 46.95 46.95 ZT4-7 20.7 20.7 20.7 ZT8-11 90.45 90.45 90.45 ZT12-15 90.94999999999999 90.94999999999999 90.94999999999999 ZT16-19 62.5 62.5 62.5 ZT20-23 76.6 76.6 76.6