condition mean min max ZT0-3 42.920024999999995 40.1382 45.70185 ZT4-7 40.7777 40.7777 40.7777 ZT8-11 21.028100000000002 21.028100000000002 21.028100000000002 ZT12-15 0 0 0 ZT16-19 10.658455 10.658455 10.658455 ZT20-23 37.6985 37.6985 37.6985