condition mean min max ZT0-3 0.30592808175 0.081909337 0.5299468265 ZT4-7 1.2587360207499998 1.1427693165 1.374702725 ZT8-11 2.268527957 1.863851014 2.6732049 ZT12-15 2.4454208732500002 2.3226610360000004 2.5681807105 ZT16-19 2.16840614875 1.555614534 2.7811977635 ZT20-23 3.03447644325 2.6851787485000003 3.383774138