condition mean min max ZT0-3 403.75 403.75 403.75 ZT4-7 958.2 958.2 958.2 ZT8-11 922.8 922.8 922.8 ZT12-15 630.0 630.0 630.0 ZT16-19 691.8499999999999 691.8499999999999 691.8499999999999 ZT20-23 642.3499999999999 642.3499999999999 642.3499999999999