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.
One Japanese soldier was taken prisoner and 129 Japanese soldiers were killed. Out of all the Japanese ships that participated in the attack on Pearl Harbor only one, the Ushio, survived until the end of the war. It was surrendered to the U.S. at Yokosuka Naval Base.