condition mean min max ZT0-3 0.074522 0.0 0.149044 ZT4-7 0.300847 0.300847 0.300847 ZT8-11 0.3062475 0.3062475 0.3062475 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0