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Answer:

There are a number of ways of improving the validity of an experiment, including controlling more variables, improving measurement technique, increasing randomization to reduce sample bias, blinding the experiment, and adding control or placebo groups.

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One of the ways to improve the design of an experiment of investigation is to introduce an control in order to decipher the validity of the design.

What is an investigation design?

The term investigation design can also be referred to as experimental design. It has to do with the way that a person plans out an experiment.

In this case, one of the ways to improve the design of an experiment of investigation is to introduce an control in order to decipher the validity of the design.

Learn more about control variables:https://brainly.com/question/17555102

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