condition mean min max ZT0-3 2616.15 2616.15 2616.15 ZT4-7 2527.7 2527.7 2527.7 ZT8-11 2341.9 2341.9 2341.9 ZT12-15 1196.0 1196.0 1196.0 ZT16-19 449.04999999999995 449.04999999999995 449.04999999999995 ZT20-23 908.3499999999999 908.3499999999999 908.3499999999999