condition mean min max ZT0-3 10.473513 10.473513 10.473513 ZT4-7 11.2119135 11.2119135 11.2119135 ZT8-11 10.0290795 10.0290795 10.0290795 ZT12-15 11.0476735 11.0476735 11.0476735 ZT16-19 9.575997000000001 9.575997000000001 9.575997000000001 ZT20-23 10.551110000000001 10.551110000000001 10.551110000000001