condition mean min max ZT0-3 0.060829775 0.04862455 0.073035 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.04795355 0.04795355 0.04795355