condition mean min max ZT0-3 74.79237548999998 51.35715451 98.22759646999998 ZT4-7 99.3003382725 99.24864740499999 99.35202914 ZT8-11 107.05319525 103.2449496 110.8614409 ZT12-15 79.69536879750001 69.212419925 90.17831767 ZT16-19 41.85525474 39.33855821 44.37195127 ZT20-23 31.600647182499998 29.926290185 33.275004179999996