condition mean min max ZT0-3 0.0283656 0.0283656 0.0283656 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.183028 0.183028 0.183028 ZT16-19 0.0 0.0 0.0 ZT20-23 0.057782 0.057782 0.057782