condition mean min max ZT0-3 87.05000000000001 87.05000000000001 87.05000000000001 ZT4-7 64.4 64.4 64.4 ZT8-11 84.75 84.75 84.75 ZT12-15 71.7 71.7 71.7 ZT16-19 59.7 59.7 59.7 ZT20-23 91.44999999999999 91.44999999999999 91.44999999999999