condition mean min max ZT0-3 43.05 43.05 43.05 ZT4-7 42.0 42.0 42.0 ZT8-11 31.200000000000003 31.200000000000003 31.200000000000003 ZT12-15 19.6 19.6 19.6 ZT16-19 43.849999999999994 43.849999999999994 43.849999999999994 ZT20-23 49.35 49.35 49.35