condition mean min max ZT0-3 3209.9 3209.9 3209.9 ZT4-7 2705.9 2705.9 2705.9 ZT8-11 2625.8999999999996 2625.8999999999996 2625.8999999999996 ZT12-15 2554.75 2554.75 2554.75 ZT16-19 2816.2 2816.2 2816.2 ZT20-23 3057.05 3057.05 3057.05