condition mean min max ZT0-3 1846.463193 1846.463193 1846.463193 ZT4-7 1570.095587 1570.095587 1570.095587 ZT8-11 2032.3761250000002 2032.3761250000002 2032.3761250000002 ZT12-15 2185.189708 2185.189708 2185.189708 ZT16-19 2460.2706369999996 2460.2706369999996 2460.2706369999996 ZT20-23 3143.5749640000004 3143.5749640000004 3143.5749640000004