condition mean min max ZT0-3 14.2797 14.2797 14.2797 ZT4-7 19.983150000000002 19.983150000000002 19.983150000000002 ZT8-11 11.82475 11.82475 11.82475 ZT12-15 9.429485 9.429485 9.429485 ZT16-19 11.400849999999998 11.400849999999998 11.400849999999998 ZT20-23 10.49895 10.49895 10.49895