condition mean min max ZT0-3 22.0957083225 11.963925595 32.22749105 ZT4-7 13.81094395 12.77201093 14.84987697 ZT8-11 23.957365550000002 17.952023955 29.962707145000003 ZT12-15 31.60822613 30.73926535 32.47718691 ZT16-19 30.05673704 29.826115025 30.287359055 ZT20-23 30.60273616 28.72972957 32.47574275