6200.2	Assessment
Research Question (Clear, unambiguous)	"[E]xamine the similarities and difference between divorce rate of interracial marriage and divorce rate of same-race marriage."  Okay.  Again, you want to focus and simplify.  Research comparing the vulnerability to divorce of interracial and same-race marriages is reasonable and sufficient.
Relevant Literature	Omitted.  There is a large, relevant literature.
Causal Interpretations (clear, all parts defined, mechanisms, controls, plausible)	Whatever here was meant to be causal statements are too vague or awkward to follow.  You need to look at the literature on what makes certain kinds of marriages more vulnerable to divorce and think through how this might apply to your comparison.
Data (variables, sample, comparison)	The efforts to discuss data also make little sense here.  What kind of data do you need?  One straightforward strategy to identify appropriate data is to look at the work others have done on divorce rates, discover what data they have used, consider which of those data sources makes sense for your goals.  Also, note that the research issue means that you would need appropriate controls for the potential influences that overlap with those of racial identity.
Research Value	Again, what is written here makes little sense.  You are supposed to indicate why this research is worth doing.  For example, why would some agency provide money to fund such research?
Overall	And, again, a reasonable research topic but poor effort to provide a research plan.