condition mean min max ZT0-3 100.65 100.65 100.65 ZT4-7 88.2 88.2 88.2 ZT8-11 63.550000000000004 63.550000000000004 63.550000000000004 ZT12-15 19.85 19.85 19.85 ZT16-19 138.1 138.1 138.1 ZT20-23 118.69999999999999 118.69999999999999 118.69999999999999