condition mean min max ZT0-3 49.435900000000004 49.435900000000004 49.435900000000004 ZT4-7 26.8053 26.8053 26.8053 ZT8-11 28.79385 28.79385 28.79385 ZT12-15 37.685050000000004 37.685050000000004 37.685050000000004 ZT16-19 49.9664 49.9664 49.9664 ZT20-23 58.86875 58.86875 58.86875