condition mean min max ZT0-3 37.2466 37.2466 37.2466 ZT4-7 27.69745 27.69745 27.69745 ZT8-11 15.937450000000002 15.937450000000002 15.937450000000002 ZT12-15 13.3341 13.3341 13.3341 ZT16-19 35.5463 35.5463 35.5463 ZT20-23 32.599999999999994 32.599999999999994 32.599999999999994