condition mean min max ZT0-3 6118.35 6118.35 6118.35 ZT4-7 9595.3 9595.3 9595.3 ZT8-11 8183.0 8183.0 8183.0 ZT12-15 7494.450000000001 7494.450000000001 7494.450000000001 ZT16-19 5950.15 5950.15 5950.15 ZT20-23 5953.75 5953.75 5953.75