condition mean min max ZT0-3 12.012599999999999 12.012599999999999 12.012599999999999 ZT4-7 10.031410000000001 10.031410000000001 10.031410000000001 ZT8-11 8.674005000000001 8.674005000000001 8.674005000000001 ZT12-15 10.345895 10.345895 10.345895 ZT16-19 14.7241 14.7241 14.7241 ZT20-23 10.886849999999999 10.886849999999999 10.886849999999999