Scientific control
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A scientific control is an element of an experiment or observation designed to minimize the influence of variables other than the independent variable under investigation, thereby reducing the risk of
Take identical growing plants (Argyroxiphium sandwicense) and give fertilizer to half of them. If there are differences between the fertilized treatment and the unfertilized treatment, these differences may be due to the fertilizer as long as there weren't other confounding factors that affected the result. For example, if the fertilizer was spread by a tractor but no tractor was used on the unfertilized treatment, then the effect of the tractor needs to be controlled.
Design of experiments
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The design of experiments, also known as experimental design, refers to the construction of procedures that attempt to explain how changes in one aspect of a system will lead to changes in other aspec
Scientific control
…False positives and false negatives Designed experiment Controlling for a variable…
Design of experiments with full factorial design (left), response surface with second-degree polynomial (right)
Blocking (right)
Balance à tabac 1850