condition mean min max ZT0-3 0.66780225 0.631294 0.7043105000000001 ZT4-7 0.658319 0.658319 0.658319 ZT8-11 1.11376 1.11376 1.11376 ZT12-15 0 0 0 ZT16-19 1.8526699999999998 1.8526699999999998 1.8526699999999998 ZT20-23 1.822275 1.822275 1.822275