condition mean min max ZT0-3 74.44999999999999 74.44999999999999 74.44999999999999 ZT4-7 85.9 85.9 85.9 ZT8-11 64.2 64.2 64.2 ZT12-15 72.55000000000001 72.55000000000001 72.55000000000001 ZT16-19 99.75 99.75 99.75 ZT20-23 72.6 72.6 72.6