condition mean min max ZT0-3 0.4869915 0.4869915 0.4869915 ZT4-7 0.5483565 0.5483565 0.5483565 ZT8-11 0.277677 0.277677 0.277677 ZT12-15 0.7251565 0.7251565 0.7251565 ZT16-19 0.342632 0.342632 0.342632 ZT20-23 0.5476225 0.5476225 0.5476225