condition mean min max ZT0-3 0.3706561666666667 0.3470565 0.413567 ZT4-7 0.38702800000000004 0.38702800000000004 0.38702800000000004 ZT8-11 0.1348395 0.1348395 0.1348395 ZT12-15 0.32271774999999997 0.281099 0.36433649999999995 ZT16-19 0.1933495 0.1933495 0.1933495 ZT20-23 0.5754319999999999 0.5754319999999999 0.5754319999999999