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 2.0000725 0.0 4.000145 ZT16-19 1.717395 1.717395 1.717395 ZT20-23 0.0 0.0 0.0