condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.00500721675 0.0 0.0100144335 ZT16-19 0.00644114325 0.0 0.0128822865 ZT20-23 0.00364464375 0.0 0.0072892875