An experiment is the most direct way to test a hypothesis about a cause-effect relationship.
A researcher can conclude that a change in the dependent variable is caused by a change in the independent variable if other variables are held constant and only the independent variable is altered.
The hypothesis should establish a cause and effect link in an experimental inquiry. The investigation's independent variable is the cause, while the dependent variable, which represents the student's forecast of what will happen, is the effect or result.
When one thing triggers the occurrence of another, there is a relationship between the two called cause and effect. For instance, we gain weight if we eat too much and do not exercise. The "cause" is eating food without exercising, and the "result" is weight gain. There could be several causes as well as several effects.
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