condition mean min max ZT0-3 34.599999999999994 34.599999999999994 34.599999999999994 ZT4-7 22.9 22.9 22.9 ZT8-11 42.150000000000006 42.150000000000006 42.150000000000006 ZT12-15 56.95 56.95 56.95 ZT16-19 22.25 22.25 22.25 ZT20-23 39.150000000000006 39.150000000000006 39.150000000000006