condition mean min max ZT0-3 159.3 159.3 159.3 ZT4-7 88.1 88.1 88.1 ZT8-11 124.94999999999999 124.94999999999999 124.94999999999999 ZT12-15 115.75 115.75 115.75 ZT16-19 81.19999999999999 81.19999999999999 81.19999999999999 ZT20-23 107.55 107.55 107.55