Definition: A control variable is a variable that is held constant in a research analysis.The use of control variables is generally done to answer four basic kinds of questions: 1.Is an observed relationship between two variables just a statistical accident? 2.efinition: A control variable is a variable that is held constant in a research analysis.
How Many People Died At Pearl Harbor. Those who have read about American history are acquainted with Japanese attacking the US naval base located at Pearl Harbor on 7th December 1941. The Americans were attacked unaware, without any warning by Japan. This resulted in loss of lives of 2,402 Americans and left around 1282 people injured.
Chart 1: December 7, 1941 losses. Of the total number of men killed at Pearl Harbor, approximately 1,177 were sailors and marines serving on the USS Arizona. Approximately 333 men aboard the USS Arizona survived the attack. 1. Why was the Japanese casualty list so low compared with that of the United States? 2. What percentage of U.S. losses came from the Arizona? 3. What percentage of the total crew on the Arizona survived? 4. Do these figures help you to understand why the remains of the Arizona were chosen as a site for a memorial? Why or why not? Information for Chart 1 comes from the USS Arizona Memorial, National Park Service.