condition mean min max ZT0-3 0.356053 0.3263545 0.3857515 ZT4-7 0.7746065 0.7746065 0.7746065 ZT8-11 0.27711600000000003 0.27711600000000003 0.27711600000000003 ZT12-15 0 0 0 ZT16-19 0.8129255 0.8129255 0.8129255 ZT20-23 1.1443665 1.1443665 1.1443665