condition mean min max ZT0-3 144.643166 144.643166 144.643166 ZT4-7 102.0138345 102.0138345 102.0138345 ZT8-11 104.1970685 104.1970685 104.1970685 ZT12-15 111.9007695 111.9007695 111.9007695 ZT16-19 150.5396875 150.5396875 150.5396875 ZT20-23 161.673141 161.673141 161.673141