condition mean min max ZT0-3 1440.85 1440.85 1440.85 ZT4-7 1345.5 1345.5 1345.5 ZT8-11 1280.35 1280.35 1280.35 ZT12-15 1577.6999999999998 1577.6999999999998 1577.6999999999998 ZT16-19 1417.25 1417.25 1417.25 ZT20-23 1526.35 1526.35 1526.35