condition mean min max ZT0-3 1393.95 1393.95 1393.95 ZT4-7 994.4 994.4 994.4 ZT8-11 1171.2 1171.2 1171.2 ZT12-15 1449.45 1449.45 1449.45 ZT16-19 1182.3 1182.3 1182.3 ZT20-23 1095.4499999999998 1095.4499999999998 1095.4499999999998