condition mean min max ZT0-3 0.03972525 0.0 0.0794505 ZT4-7 1.9807869999999999 1.9807869999999999 1.9807869999999999 ZT8-11 0.482774 0.482774 0.482774 ZT12-15 0 0 0 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0