ocr: This statistical graph shows that while executions have increased,the murder rate has stayedthe same. Does this data support anyconclusion about the effectiveness - ofthe death penalty? The claim "The number I of executions has not affected national murder rates' suggests a causalrelationship between the two:lf the death penalty was a deterrent to murder, we would see the murder rate drop I asthe number of executions rose. It's possible, however, that otherfactors might be responsible for the data.