condition mean min max ZT0-3 164.714629 164.714629 164.714629 ZT4-7 88.899643 88.899643 88.899643 ZT8-11 128.1608645 128.1608645 128.1608645 ZT12-15 116.54880349999999 116.54880349999999 116.54880349999999 ZT16-19 150.337764 150.337764 150.337764 ZT20-23 94.645275 94.645275 94.645275