condition mean min max ZT0-3 0.47517775 0.274699 0.6756565 ZT4-7 0.41457750000000004 0.41457750000000004 0.41457750000000004 ZT8-11 0.1395645 0.1395645 0.1395645 ZT12-15 0 0 0 ZT16-19 0.270373 0.270373 0.270373 ZT20-23 0.2723385 0.2723385 0.2723385