For the data used in Exercise 11, compute the hat matrix and identify any leverage points. Also check for leverage points with the S-PLUS function reglev. How do the results compare? For the data in...

For the data used in Exercise 11, compute the hat matrix and identify any leverage points. Also check for leverage points with the S-PLUS function reglev. How do the results compare?

For the data in Exercise 13, identify any leverage points using the hat matrix. Next, identify leverage points with the function reglev. How do the results compare?