condition mean min max ZT0-3 1.1465299999999998 1.1465299999999998 1.1465299999999998 ZT4-7 1.45313 1.45313 1.45313 ZT8-11 1.181905 1.181905 1.181905 ZT12-15 0.0 0.0 0.0 ZT16-19 0.630835 0.630835 0.630835 ZT20-23 0.9428185 0.9428185 0.9428185