condition mean min max ZT0-3 1512.65 1512.65 1512.65 ZT4-7 1190.9 1190.9 1190.9 ZT8-11 991.75 991.75 991.75 ZT12-15 884.8 884.8 884.8 ZT16-19 1067.5 1067.5 1067.5 ZT20-23 1374.9499999999998 1374.9499999999998 1374.9499999999998