condition mean min max ZT0-3 12.0463318465 10.75521254 13.337451153 ZT4-7 19.7673326 16.696848385 22.837816815 ZT8-11 27.52373388 26.945490495 28.101977265000002 ZT12-15 10.33983000175 6.146465481 14.5331945225 ZT16-19 4.782649183 4.4862377295 5.0790606364999995 ZT20-23 4.20711256725 3.3358124155000004 5.078412719