condition mean min max ZT0-3 0.46575700000000003 0.059525 0.871989 ZT4-7 7.207125 7.207125 7.207125 ZT8-11 2.030995 2.030995 2.030995 ZT12-15 0 0 0 ZT16-19 0.4677775 0.4677775 0.4677775 ZT20-23 0.940761 0.940761 0.940761