condition mean min max ZT0-3 4.77942 4.77942 4.77942 ZT4-7 2.07326 2.07326 2.07326 ZT8-11 7.688269999999999 7.688269999999999 7.688269999999999 ZT12-15 19.795 19.795 19.795 ZT16-19 16.24135 16.24135 16.24135 ZT20-23 9.303640000000001 9.303640000000001 9.303640000000001