condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0055636 0.0055636 0.0055636 ZT8-11 0.0 0.0 0.0 ZT12-15 0.0167358 0.0167358 0.0167358 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0