University Hospital conducted a study in order to determine the blood type distribution of its patients. During each of the hospital's three laboratory work shifts (day, evening, and overnight), a random sample of fifteen patients who had blood tests performed during that shift was selected. The blood types for these randomly selected patients are given below. Day Shift : O, A, A, B, O, A, A, O, A, A, O, AB, O, O, A Evening : A, O, O, O, A, O, O, B, O, AB, O, O, A, A, B Overnight : O, O, O, O, A, B, A, A, O, A, A, A, B, O, O

Construct a proportion Pareto chart with this data and describe the result.