Which two pieces of data could indicate that a volcano is about to erupt? a) a series of small earthquakes b) a decrease in air pressure c) a very large thunderstorm d) a change in the slope of the ground

The areas with the highest population density in europe are most likely to be

Why would it be hard to live in a city state

Using mr smith and his id, identify two potential internal validity threats that might affect the a—b design. tell me how that threat might impact conclusions in the a—b design. note #1: you cannot use maturation (since i already did that one for note #2: there are some mr smith id threats that won’t have much impact in a single case design.