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.
On April 17, 1975, Pol Pot led the Communist forces of the Khmer Rouge into the capital city of Phnom Penh, beginning a vicious four-year regime in Cambodia. Approximately one million people were killed, or one-seventh of Cambodiaâs population according to conservative estimates, in a country no bigger than the state of Missouri. Most died from starvation, malnutrition and mistreated or misdiagnosed illness. Another 200,000 were executed as enemies of the state.