Some biologists are interested in the relationship between the length and width of an animal's mouth, because that relationship can influence the...

Some biologists are interested in the relationship between the length and width of an animal's mouth, because that relationship can influence the animal's diet. Although the length and width are obviously both dependent on the animal's size, it is reasonable to assume that the relationship does not change in mature animals of the same species.

The file crocs.csv contains the following variables, measured on 25 American crocodiles (Crocodylus acutus):

·        Length: the length of the mouth, in mm

·        Width: the width of the mouth, in mm

Assuming that this sample is representative of all American crocodiles, estimate the population mean mouth width of all American crocodiles whose mouths are 600 mm in length.

A)    What inferential procedure would you use to answer this question?

B) Perform background and exploratory data analysis to determine whether the assumptions of the procedure have been met.

C) Are all assumptions met (or at least not terribly violated)? If not, explain the violation(s).

D) If assumptions are violated, stop here. If assumptions are okay, perform the inference: