D.6 Case 6

Hospital Data.

From \(n = 113\) hospitals in the United States are used to assess factors related to the likelihood that a hospital patients acquires an infection while hospitalized. The variables here are \(y\) = infection risk, \(x_1\) = average length of patient stay, \(x_2\) = average patient age, \(x_3\) = measure of how many x-rays are given in the hospital.