condition mean min max ZT0-3 3995.65 3995.65 3995.65 ZT4-7 6110.6 6110.6 6110.6 ZT8-11 4877.799999999999 4877.799999999999 4877.799999999999 ZT12-15 3110.1000000000004 3110.1000000000004 3110.1000000000004 ZT16-19 2337.2 2337.2 2337.2 ZT20-23 2320.75 2320.75 2320.75