condition mean min max ZT0-3 88.49167499999999 87.47819999999999 89.50515 ZT4-7 98.8807 98.8807 98.8807 ZT8-11 78.793 78.793 78.793 ZT12-15 0 0 0 ZT16-19 64.17595 64.17595 64.17595 ZT20-23 62.4032 62.4032 62.4032