condition mean min max ZT0-3 1964.65 1964.65 1964.65 ZT4-7 2280.8 2280.8 2280.8 ZT8-11 1541.65 1541.65 1541.65 ZT12-15 1517.75 1517.75 1517.75 ZT16-19 1631.5 1631.5 1631.5 ZT20-23 1566.1 1566.1 1566.1