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.
However, after Pearl Harbor there was no question about whether or not the United States was in the war or not. The after effects of Pearl Harbor were also the weaponry and the amount of people that didn't live through the attack. ...almost 3,000 Americans were killed. Six battles ships were destroyed or rendered unseaworthy, most of the ground planes were ravaged as well (Website 3).