condition mean min max ZT0-3 10.331801 10.331801 10.331801 ZT4-7 10.087939500000001 10.087939500000001 10.087939500000001 ZT8-11 10.456468000000001 10.456468000000001 10.456468000000001 ZT12-15 10.3595 10.3595 10.3595 ZT16-19 11.393749 11.393749 11.393749 ZT20-23 9.9625935 9.9625935 9.9625935