condition mean min max ZT0-3 41.46026666666667 19.60335 56.05355 ZT4-7 15.181049999999999 15.181049999999999 15.181049999999999 ZT8-11 16.6219 16.6219 16.6219 ZT12-15 38.91 32.5017 45.3183 ZT16-19 46.2529 46.2529 46.2529 ZT20-23 76.6335 76.6335 76.6335