condition mean min max ZT0-3 66.2831 66.2831 66.2831 ZT4-7 52.582049999999995 52.582049999999995 52.582049999999995 ZT8-11 44.27915 44.27915 44.27915 ZT12-15 48.10850000000001 48.10850000000001 48.10850000000001 ZT16-19 63.7463 63.7463 63.7463 ZT20-23 74.94675000000001 74.94675000000001 74.94675000000001