condition mean min max ZT0-3 1085.0016666666666 626.38 1397.7849999999999 ZT4-7 357.46799999999996 357.46799999999996 357.46799999999996 ZT8-11 472.4055 472.4055 472.4055 ZT12-15 822.7182499999999 704.9314999999999 940.505 ZT16-19 1137.405 1137.405 1137.405 ZT20-23 1419.8899999999999 1419.8899999999999 1419.8899999999999