In an un weighted regression problem with n = 54, p′ = 5, the results included and the following statistics for four of the cases: For each of these four cases, compute ri, Di, and ti. Test each of...

In an un weighted regression problem with n = 54, p′ = 5, the results included

and the following statistics for four of the cases:

For each of these four cases, compute ri, Di, and ti. Test each of the four cases to be an outlier. Make a qualitative statement about the influence of each case on the analysis.