condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.27379 0.27379 0.27379 ZT12-15 0.416219 0.297878 0.53456 ZT16-19 0.76733 0.76733 0.76733 ZT20-23 0.59865 0.59865 0.59865