Why do we need to control some variable

1.	Why do we need to control some variable
Answer» Explanation: Controlling variables is important because slight VARIATIONS in the experimental set-up could strongly affect the outcome being MEASURED. For example, during the 1950s, a number of experiments were CONDUCTED to evaluate the TOXICITY in mammals of the metal molybdenum, using rats as experimental subjects.

Answer»

Explanation:

Controlling variables is important because slight VARIATIONS in the experimental set-up could strongly affect the outcome being MEASURED. For example, during the 1950s, a number of experiments were CONDUCTED to evaluate the TOXICITY in mammals of the metal molybdenum, using rats as experimental subjects.

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Why do we need to control some variable​

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Why do we need to control some variable