condition mean min max ZT0-3 72.5 72.5 72.5 ZT4-7 118.5 118.5 118.5 ZT8-11 102.69999999999999 102.69999999999999 102.69999999999999 ZT12-15 100.6 100.6 100.6 ZT16-19 89.25 89.25 89.25 ZT20-23 67.75 67.75 67.75