condition mean min max ZT0-3 1.2321990451666667 0.0002921355 2.57957 ZT4-7 0.0 0.0 0.0 ZT8-11 0.789695 0.789695 0.789695 ZT12-15 0.5561675 0.0 1.112335 ZT16-19 0.00902455 0.00902455 0.00902455 ZT20-23 1.65264 1.65264 1.65264