condition mean min max ZT0-3 3471.95 3471.95 3471.95 ZT4-7 2930.3 2930.3 2930.3 ZT8-11 2857.4 2857.4 2857.4 ZT12-15 2534.0 2534.0 2534.0 ZT16-19 2620.25 2620.25 2620.25 ZT20-23 3295.7 3295.7 3295.7