condition mean min max ZT0-3 0.426455 0.0 0.85291 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0 0 0 ZT16-19 0.8383805 0.8383805 0.8383805 ZT20-23 0.281861 0.281861 0.281861