condition mean min max ZT0-3 50.85 50.85 50.85 ZT4-7 55.7 55.7 55.7 ZT8-11 105.05000000000001 105.05000000000001 105.05000000000001 ZT12-15 77.55000000000001 77.55000000000001 77.55000000000001 ZT16-19 77.69999999999999 77.69999999999999 77.69999999999999 ZT20-23 72.25 72.25 72.25