Refer to spatial and temporal variations. However, it is too easy to imagine possible counterarguments. A thesis statement: tells the reader how you will interpret the significance of the subject matter under discussion.
Revised theses: Because modern cinematic techniques have allowed filmmakers to get more graphic, horror flicks have desensitized young American viewers to violence. We would like you to gather evidence -- from various sources -- to allow you to make interpretations and judgments.
When you make a subjective judgment call, specify and justify your reasoning. If you can make predictions about what will be found if X is true, then do so. In writing the discussion session, be sure to adequately discuss the work of other authors who collected data on the same or related scientific questions.
Academized know how tricky it can be to write a thesis paper well. You are finished when you have a set of plots that show a definite trend or lack of a trend.
Revised thesis: If the government takes over industry in Kenya, the industry will become more efficient.