A hypothesis is a statement that contains an explanation
to a phenomena. Hypothesis can be either proven or disproven. In most cases the
hypothesis is something that can be tested in some way, usually
quantitative.
The purpose of the variables is to see how
they are related and to allow you to have control over the experiment. The independent
variable is what the experimenter alters or enacts in order to conduct the
experiment.
The dependent variable is the changes of the
independent variable. The dependent variable depends on what happens during the
independent variable. In other words, the dependent variable is dependent upon the
independent variable.
There are also variables that are
called controlled variables. These variables are anything that can have an influence
upon the dependent variable.
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