Meat consumption may be a risk factor for colon cancer. This hypothesis was inve

Question

Meat consumption may be a risk factor for colon cancer. This hypothesis was investigate by collecting data on the amount of red meat consumed in regions of the United States and the colon cancer rates in these areas. The data are show below: From this data, the researchers concluded that there is a significant dose-response association between red meat consumption and incident colon cancer. This observation may be incorrect because: A. No statistical test is presented to support the significance claim B. The data are not age-adjusted C. There may be confounding by preparation methods D. The meat consumption habits of persons with colon cancer are not reported

Explanation / Answer

In each of the region, the data was collected on the same set of individuals to calculate the per capita consumption of red meat and also the rate of colon cancer. So, I think that to analyse the association between amount of red meat consumption and rate of colon cancer the sample has been drawn in a proper way. But, just looking at the sample, a conclusion of the population association would be vague or misleading. We should properly conduct a test of hypothesis to test whether there is any association or not. Becaue, an eyballing conclusion can be led by many sampling error or chance factor. So, the observation may be solely due to chance factor.

So, the observation may be incorrect because the reason is (A) - No statistical test is presented to support the significance claim

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