A hypothesis is the answer to the key question, usually in the form of one or two sentences. It contains both the argument and the main reasons in support of your argument. Each hypothesis should clearly state the ‘answer’ to the question, followed by a ‘why’.
The indigenous people of Australia were treated as second-class citizens until the 1960’s (answer) by the denial of basic political rights by State and Federal governments (why).
History Skills Online has a ready-to-use Research Journal that follows these 9 steps and provides links back to the website to help you at each stage of your research. You can grab it here.