condition mean min max ZT0-3 2035.8788889999998 2035.8788889999998 2035.8788889999998 ZT4-7 2178.1561110000002 2178.1561110000002 2178.1561110000002 ZT8-11 2364.8616666666667 2364.8616666666667 2364.8616666666667 ZT12-15 1960.572222 1960.572222 1960.572222 ZT16-19 2038.588889 2038.588889 2038.588889 ZT20-23 1691.6399999999999 1691.6399999999999 1691.6399999999999