condition mean min max ZT0-3 22.1359 22.1359 22.1359 ZT4-7 16.9015 16.9015 16.9015 ZT8-11 18.6052 18.6052 18.6052 ZT12-15 24.6757 24.6757 24.6757 ZT16-19 24.42855 24.42855 24.42855 ZT20-23 24.027700000000003 24.027700000000003 24.027700000000003