Answer:To Prevent Bias which may arise from a major difference from personal characteristics.
Explanation: Sampling is a part of a population that is to be used for a research or experiment.
Variables are factors or members of a sample or Population that are can be altered (Dependent variables) in order to create an effect on another variables.
Independent variables are variables that are consistent and are not affected by other variables.
To Prevent BIAS,proper Sampling or inducing independent variables it must include all the factors necessary in an experiment or research.
Answer:
The United States began to provide significant military supplies and other assistance to the Allies in September 1940, even though the United States did not enter the war until December 1941.
Explanation:
Answer:
The Seljuks conquests had cut off Europe from access to Jerusalem
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Moving existing nuclear weapons to locations from which they could reach American targets was one." A second reason that Soviet missiles were deployed to Cuba was because Khrushchev wanted to bring West Berlin, controlled by the American, British and French within Communist East Germany, into the Soviet orbit.