A null hypothesis is a statement that the independent variable will have no effect on the
An alternate hypothesis is a statement that the independent has a specific and predicted
the dependent variable.
Dependent variable is what is being observed and recorded, it is dependent on the
independent variables, which are the variables being tested.
Having control variables is important because it minimizes the chances of other factors
affecting the experimental results. The more controlled the experiment, the more accurate
the results and clearer the cause and effect of the independent variables on the dependent
Controlled experiments have two groups with only one group introduced with the
independent variable being tested.
If the intervals overlap, there is weak or insignificant correlation; if they do not, then
there is a strong correlation and the results are significant. If they just touch each other
(the upper and lower intervals are the same) then