condition mean min max ZT0-3 57.0 57.0 57.0 ZT4-7 78.3 78.3 78.3 ZT8-11 115.95 115.95 115.95 ZT12-15 60.150000000000006 60.150000000000006 60.150000000000006 ZT16-19 51.95 51.95 51.95 ZT20-23 35.2 35.2 35.2