condition mean min max ZT0-3 59.4955 59.4955 59.4955 ZT4-7 50.37575 50.37575 50.37575 ZT8-11 29.1524 29.1524 29.1524 ZT12-15 48.436899999999994 48.436899999999994 48.436899999999994 ZT16-19 52.459500000000006 52.459500000000006 52.459500000000006 ZT20-23 56.57555 56.57555 56.57555