condition mean min max ZT0-3 25.9614 25.9614 25.9614 ZT4-7 26.34655 26.34655 26.34655 ZT8-11 16.68345 16.68345 16.68345 ZT12-15 17.0346 17.0346 17.0346 ZT16-19 18.14175 18.14175 18.14175 ZT20-23 22.783450000000002 22.783450000000002 22.783450000000002