condition mean min max ZT0-3 643.9 643.9 643.9 ZT4-7 1117.5 1117.5 1117.5 ZT8-11 1507.05 1507.05 1507.05 ZT12-15 1482.4 1482.4 1482.4 ZT16-19 945.0999999999999 945.0999999999999 945.0999999999999 ZT20-23 719.4 719.4 719.4