condition mean min max ZT0-3 7.432112500000001 7.0509450000000005 7.81328 ZT4-7 10.235700000000001 10.235700000000001 10.235700000000001 ZT8-11 9.56083 9.56083 9.56083 ZT12-15 0 0 0 ZT16-19 11.7013 11.7013 11.7013 ZT20-23 8.380595 8.380595 8.380595