Why is it incorrect to conclude that deaths due to stomach or oral cancers are more common in MTR counties even though the MTR bar for each indicates a higher number of deaths? Oral and stomach cancers had the lowest occurrence, therefore accurate death rates are difficult to determine. Oral and stomach cancers are not usually fatal compared to other cancers, so death rates are not dependable statistics, The differences in the rates of these cancers between MTR areas and other areas were not shown to be statistically significant. Researchers collected insufficient data for stomach and oral cancers in order to make accurate statistical comparisions