condition mean min max ZT0-3 70.80555000000001 70.80555000000001 70.80555000000001 ZT4-7 81.76135 81.76135 81.76135 ZT8-11 54.528949999999995 54.528949999999995 54.528949999999995 ZT12-15 33.27705 33.27705 33.27705 ZT16-19 43.6306 43.6306 43.6306 ZT20-23 48.11925 48.11925 48.11925