I miss the connection between race being associated with colonoscopy completion and how this reflects a population of immigrants? Is this b/c you are using a dataset with a large proportion of immigrants or are you suggesting that racial categories in the US are a reflection that we're a national of immigrants? Or something else? For your answer to #2, could you think about what aspect of education makes the instructions easier to understand? Is it basic literacy? critical thinking? I'm asking to see if you think college education provides those skills when high school wouldn't?