condition mean min max ZT0-3 10.829086666666667 9.87281 11.528300000000002 ZT4-7 9.755305 9.755305 9.755305 ZT8-11 8.418175000000002 8.418175000000002 8.418175000000002 ZT12-15 10.99515 10.303 11.6873 ZT16-19 9.390055 9.390055 9.390055 ZT20-23 11.632349999999999 11.632349999999999 11.632349999999999