condition mean min max ZT0-3 0.36749366666666666 0.34581 0.38775 ZT4-7 0.678365 0.678365 0.678365 ZT8-11 0.356623 0.356623 0.356623 ZT12-15 0.0 0.0 0.0 ZT16-19 0.332571 0.332571 0.332571 ZT20-23 0.0 0.0 0.0