condition mean min max ZT0-3 45.900000000000006 45.900000000000006 45.900000000000006 ZT4-7 12.3 12.3 12.3 ZT8-11 56.900000000000006 56.900000000000006 56.900000000000006 ZT12-15 43.45 43.45 43.45 ZT16-19 28.45 28.45 28.45 ZT20-23 71.6 71.6 71.6