condition mean min max ZT0-3 13.9049 13.9049 13.9049 ZT4-7 12.42435 12.42435 12.42435 ZT8-11 9.775649999999999 9.775649999999999 9.775649999999999 ZT12-15 12.0823 12.0823 12.0823 ZT16-19 17.134900000000002 17.134900000000002 17.134900000000002 ZT20-23 16.311 16.311 16.311