Since only one factor changed in this experiment it is called a

A hypothesis that is tested with the manipulation of one variable, that is referred to as a controlled experiment. The change that comes from the manipulation creates a causality that is formed through cause-and-effect that is directional. The variable that is been up late it is called the independent variable, and the researcher is focused on observing the reaction of the variable that is left unaltered, and referred to as the dependent variable.

It is the variable. The motivation behind any trial ought to be (or typically is) to decide whether there is a connection between two things, and assuming this is the case, how that relationship works. The most expert research will frequently part these into independent trials to limit the likelihood of circumstances and end results being confounded. A significant part of the examination engaged with an analysis.