There are many dissertation guide materials that you can find online. However, not all of them can be reliable especially when it comes to thesis statement creation. But for your convenience, let us simply give you some ideas how to build your problem statement that will involve the very study aspect of your dissertation.
A research paper thesis should have a definite trend as to what types of knowledge you wish to develop. Therefore, when creating your thesis statement, try to be very creative but at the same time be considerate on how significant your problem is. Usually, students may claim a particular aspect about a subject not knowing that they are only building something that do not really mean anything for to general population.
A thesis statement should also be something that will seek more information out of already established facts. You should carefully analyze what are the main contributions of the subject parameter to the scientific knowledge and build something out of the facts to make your life much easier. Because of this notion, you can do your researching with fewer difficulties because available resources will be easy to find.
Lastly, a thesis statement should only define a single notion. You can create a problem that intends to answer only one type of a question. You can simply add more subjects later on as you build the results of your dissertation.
Examples of thesis statements are available to be downloaded from the net. But if you need something that is reliable you can check out the Samples page of this website.