condition mean min max ZT0-3 0.02471365 0.0 0.03827595 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0369604 0.0369604 0.0369604 ZT12-15 0.1222275 0.0 0.244455 ZT16-19 0.0 0.0 0.0 ZT20-23 0.04033245 0.04033245 0.04033245