condition mean min max ZT0-3 0.8211885 0.8211885 0.8211885 ZT4-7 0.6323505 0.6323505 0.6323505 ZT8-11 0.4305065 0.4305065 0.4305065 ZT12-15 0.917351 0.917351 0.917351 ZT16-19 0.613654 0.613654 0.613654 ZT20-23 1.249635 1.249635 1.249635