condition mean min max ZT0-3 0.4093 0.4093 0.4093 ZT4-7 0.459308 0.459308 0.459308 ZT8-11 0.18443159999999997 0.18443159999999997 0.18443159999999997 ZT12-15 0.28840200000000005 0.28840200000000005 0.28840200000000005 ZT16-19 0.624087 0.624087 0.624087 ZT20-23 0.702095 0.702095 0.702095