求对照实验（controlled experiment）的含义的英文

求对照实验（controlled experiment）的含义的英文
求对照实验（controlled experiment）的含义的英文

求对照实验（controlled experiment）的含义的英文
A controlled experiment is one in which everything is held constant except for one variable.Usually a set of data is taken for a control group,which is commonly the normal or usual state,and one or more other groups are examined,where all conditions are identical to the control group and each other except this one variable.Sometimes it's necessary to change more than one variable,but all of the experimental conditions will be controlled so that only the variables being examined change and the amount or way they change is measured.
It is a experiment testing only ONE factor at a time.
Its a test of the effect of a single variable by changing it.
Controlled experiments provide insight into cause-and-effect by demonstrating what outcome occurs when a particular factor is manipulated.Controlled experiments vary greatly in their goal and scale,but always rely on repeatable procedure and logical analysis of the results.

The general was a test to clarify certain influences on an object and treatment effect or significance, in addition to the requirements of the factors or operation processing for experiments, other fa...

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The general was a test to clarify certain influences on an object and treatment effect or significance, in addition to the requirements of the factors or operation processing for experiments, other factors are consistent, and compare the test results, the test for the control test. Usually, a control experiment is divided into the experimental group and the control group. The experimental group, is to accept the group object of experimental variables treatment; control group, control group, the experimental hypothesis, is not to accept the group object of experimental variables, which as the experimental group, which served as the control group, the general is determined randomly, so theoretically speaking, the experimental group and the control group of independent variables impact is equal, the difference between two groups in the balance, and control the experimental group, must be determined from the effect of the experimental variables, so that the experiment results are reliable.

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