condition mean min max ZT0-3 0.7449567500000001 0.6873325 0.802581 ZT4-7 0.43232950000000003 0.43232950000000003 0.43232950000000003 ZT8-11 0.9761820000000001 0.9761820000000001 0.9761820000000001 ZT12-15 0 0 0 ZT16-19 1.994215 1.994215 1.994215 ZT20-23 1.2733175 1.2733175 1.2733175