Crows that live in urban areas make nests in a wide range of sizes. Researchers at UT Austin want to know if nest size differs between nests built in pecan trees and those built in oak trees. So they find a sample of nesting crows in each type of tree and measure the total area (cm2) of each nest in their sample. All relevant assumptions were confirmed. Which of the following statements would be the appropriate null hypothesis for this analysis? a. Mean crow nest size does not differ between the two tree types.
b. Crow nest size is independent of tree type.
c. There is a difference in mean crow nest size between the two tree types.
d. Crow nest size is related to tree type.