condition mean min max ZT0-3 9.715597500000001 9.249745 10.181450000000002 ZT4-7 26.23975 26.23975 26.23975 ZT8-11 82.39259999999999 82.39259999999999 82.39259999999999 ZT12-15 0 0 0 ZT16-19 14.544899999999998 14.544899999999998 14.544899999999998 ZT20-23 15.6004 15.6004 15.6004