condition mean min max ZT0-3 27.707633333333334 20.5581 32.7071 ZT4-7 16.0614 16.0614 16.0614 ZT8-11 11.7369 11.7369 11.7369 ZT12-15 16.560625 15.71695 17.4043 ZT16-19 18.38745 18.38745 18.38745 ZT20-23 28.5559 28.5559 28.5559