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.
5 Facts You Didn't Know About Pearl Harbor. Sure, we all know the date (December 7th, 1941), and the famous quote (a date which will live in infamy), and of course the implications and significance (2,402 Americans were killed; it launched the U.S. into World War II).