condition mean min max ZT0-3 24.724703265000002 23.81832622 25.63108031 ZT4-7 17.159875517499998 17.057746639999998 17.262004394999998 ZT8-11 19.348193445 18.71665765 19.979729239999998 ZT12-15 10.8035115475 9.456015299499999 12.1510077955 ZT16-19 9.615095132250001 9.570483903500001 9.659706361000001 ZT20-23 8.18893096425 7.653109499999999 8.7247524285