condition mean min max ZT0-3 12.538578821 7.837348007 17.239809635 ZT4-7 39.6075986225 30.74595673 48.469240514999996 ZT8-11 51.3804925475 46.10638734 56.654597755 ZT12-15 19.29747696425 10.118610752 28.4763431765 ZT16-19 28.855041277999998 23.468067831 34.242014725 ZT20-23 18.2692815395 5.941667254 30.596895824999997