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 0.02587676 0.0154929275 0.0362605925 ZT16-19 0.0 0.0 0.0 ZT20-23 0.009887677 0.0 0.019775354