condition mean min max ZT0-3 11.380700378250001 9.9681182365 12.79328252 ZT4-7 4.549262732 4.4293548365 4.6691706275 ZT8-11 5.3497444645 4.0886603565 6.610828572499999 ZT12-15 7.43590227975 6.562442497999999 8.3093620615 ZT16-19 6.893227016000001 6.4255267675 7.360927264500001 ZT20-23 11.81192016 10.859814570000001 12.76402575