condition mean min max ZT0-3 4.26013 4.26013 4.26013 ZT4-7 7.78271 7.78271 7.78271 ZT8-11 5.96225 5.96225 5.96225 ZT12-15 6.427845 6.427845 6.427845 ZT16-19 2.4624989999999998 2.4624989999999998 2.4624989999999998 ZT20-23 1.0724005 1.0724005 1.0724005