condition mean min max ZT0-3 9.223426 9.223426 9.223426 ZT4-7 10.763020000000001 10.763020000000001 10.763020000000001 ZT8-11 10.542559 10.542559 10.542559 ZT12-15 9.432565 9.432565 9.432565 ZT16-19 10.6480655 10.6480655 10.6480655 ZT20-23 10.416887 10.416887 10.416887