A large fossilized crocodilian skull was discovered in Niger, Africa. The skull measured 160 cm in length. This is one a few specimens of the...

a. Find the equation of the regression line using Excel and attach your printout here.

b. At a 5% level of significance, test the claim that the slope of the regression line is         different from zero. Write a concluding statement that could be understood by        someone who knows no statistics

c. Predict the mean value for the length of all estuarine crocodiles with a skull length of 50 cm.

d. Construct a 90% confidence interval about the mean length of all estuarine

    crocodiles with a head length of 50 cm.