What is an aim?
The aim of a study is a description of what the researchers are investigating and why.
What is an hypothesis?
The experimental/alternate hypothesis of a study is a testable prediction of what the researchers expect to happen.
What is an experimental hypothesis?
What is a null hypothesis?
Experimental-A prediction that changing the independent variable will cause a change in the dependent variable.
Null-A prediction that changing the independent variable will have no effect on the dependent variable.