condition mean min max ZT0-3 55.6 55.6 55.6 ZT4-7 45.2 45.2 45.2 ZT8-11 57.349999999999994 57.349999999999994 57.349999999999994 ZT12-15 60.400000000000006 60.400000000000006 60.400000000000006 ZT16-19 78.6 78.6 78.6 ZT20-23 42.6 42.6 42.6