condition mean min max ZT0-3 1088.4499999999998 1088.4499999999998 1088.4499999999998 ZT4-7 878.1 878.1 878.1 ZT8-11 887.35 887.35 887.35 ZT12-15 1278.35 1278.35 1278.35 ZT16-19 1336.5 1336.5 1336.5 ZT20-23 1233.7 1233.7 1233.7