condition mean min max ZT0-3 79.876204 79.876204 79.876204 ZT4-7 87.207997 87.207997 87.207997 ZT8-11 170.753336 170.753336 170.753336 ZT12-15 142.81824899999998 142.81824899999998 142.81824899999998 ZT16-19 160.2216345 160.2216345 160.2216345 ZT20-23 139.7274835 139.7274835 139.7274835