condition mean min max ZT0-3 2481.4 2481.4 2481.4 ZT4-7 2831.1 2831.1 2831.1 ZT8-11 2424.5 2424.5 2424.5 ZT12-15 2778.3999999999996 2778.3999999999996 2778.3999999999996 ZT16-19 3372.45 3372.45 3372.45 ZT20-23 2976.85 2976.85 2976.85