Context Ornithologists (zoologists who specialize in the study of birds) were interested in investigating whether birds that migrate long distances tend to have longer wingspans than similar, nonmigratory species. Research aim A recent study compared the wing lengths (in millimeters) of random samples of two subspecies of dark-eyed juncos, only one of which migrates each winter. The following multiple-choice options contain math elements, so you may need to read them in your screen reader's "reading" or "browse" mode instead of "forms" or "focus" mode. Choice 1 of 6: 1-sample t-test for a population mean, Choice 2 of 6: ANOVA Choice 3 of 6: Simple linear regression Choice 4 of 6: 1-sample z-test for a population proportion, p p Choice 5 of 6: 2-sample t-test for a difference in independent population means, 1 2 1 2 Choice 6 of 6: a t-test for a population mean difference of paired observations, d d