condition mean min max ZT0-3 83.28545 75.44375 91.12715 ZT4-7 130.8415 130.8415 130.8415 ZT8-11 53.805800000000005 53.805800000000005 53.805800000000005 ZT12-15 0 0 0 ZT16-19 35.455 35.455 35.455 ZT20-23 70.87495 70.87495 70.87495