A study draws the conclusion that obesity is a significant cause of Type 2 diabetes. Which of the following experimental parameters would not build confidence that such a cause and effect relationship is likely true?

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When conducting an experiment, you need to specify the sample groups you will be studying. The groups need to be a practical size so that it is manageable, but you also need enough participants that would allow the results to be statistically meaningful. A small sample size may not yield results that would build confidence in the relationship between the two variables since not enough people were studied.
Other important tenets of strong experimental design include the use of controls to prevent outside factors from influencing the outcomes (data) as well as considering all of the results that are generated from the experiment.

A Study Draws the Conclusion That Obesity Is a Significant