condition mean min max ZT0-3 24.902825 24.437399999999997 25.36825 ZT4-7 41.712900000000005 41.712900000000005 41.712900000000005 ZT8-11 51.732 51.732 51.732 ZT12-15 0 0 0 ZT16-19 43.83 43.83 43.83 ZT20-23 40.82475 40.82475 40.82475