condition mean min max ZT0-3 0.285003 0.285003 0.285003 ZT4-7 0.351628 0.351628 0.351628 ZT8-11 0.41313900000000003 0.41313900000000003 0.41313900000000003 ZT12-15 0.85192 0.85192 0.85192 ZT16-19 0.717317 0.717317 0.717317 ZT20-23 0.3055905 0.3055905 0.3055905