Testing hypotheses

To test their hypotheses, the researchers examined the data they collected during the period of study. 

• Using the information available to them, they assessed whether the population sizes of cliff swallows and potential scavengers living near highways had changed over time. 
• They determined how traffic patterns on these roads had changed over time. 
• They also measured the bodies of cliff swallows that had been killed on the roads and compared their features to the features of cliff swallows in the general population.
  The table below summarizes the researchers' findings.

Drag the blue labels onto the table to identify the data that is relevant to each hypothesis. Then use the pink labels to indicate whether each hypothesis is supported or not supported by the data.