condition mean min max ZT0-3 48.636821 48.636821 48.636821 ZT4-7 37.8007745 37.8007745 37.8007745 ZT8-11 64.2648985 64.2648985 64.2648985 ZT12-15 46.217155 46.217155 46.217155 ZT16-19 34.3374 34.3374 34.3374 ZT20-23 45.967147000000004 45.967147000000004 45.967147000000004