condition mean min max ZT0-3 53.7896 53.7896 53.7896 ZT4-7 48.270250000000004 48.270250000000004 48.270250000000004 ZT8-11 30.821150000000003 30.821150000000003 30.821150000000003 ZT12-15 31.29875 31.29875 31.29875 ZT16-19 52.359399999999994 52.359399999999994 52.359399999999994 ZT20-23 52.59295 52.59295 52.59295