condition mean min max ZT0-3 15.148625000000001 13.82115 16.476100000000002 ZT4-7 14.15045 14.15045 14.15045 ZT8-11 15.8156 15.8156 15.8156 ZT12-15 0 0 0 ZT16-19 16.28145 16.28145 16.28145 ZT20-23 15.11145 15.11145 15.11145