condition mean min max ZT0-3 73.57922500000001 47.48675 99.6717 ZT4-7 60.943200000000004 60.943200000000004 60.943200000000004 ZT8-11 33.4513 33.4513 33.4513 ZT12-15 26.1449625 23.7529 28.537025 ZT16-19 32.02815 25.093433333333333 38.96286666666666 ZT20-23 0 0 0