By Ashley Crossman. 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.
The estimated number of deaths is 150-300,000, mainly Jews. Chelmno, also known as Kulmhof, was a small town roughly 50 miles from the city of Lodz. It was here that the first mass killings of Jews by gas took place as part of the Final Solution.. The murder process was set up by a Sonderkommando, under the command of Herbert Lange.
In 2013 war resulted in 31,000 deaths down from 72,000 deaths in 1990. The deadliest war in history, in terms of the cumulative number of deaths since its start, is the Second World War, with 60â85 million deaths, followed by the Mongol conquests which was greater than 41 million.