1.Researchers select 200 patients with colon cancer and 200 patients without colon cancer. Of the 200 patients with colon cancer, 45 smoke cigars while 15 of the 200 patients without colon cancer smoke cigars.

a.Calculate a measure of association between colon cancer and cigar smoking. Show your work / computation

Relative Risk? Odd Ratio?

b. Interpret the measure of association you calculated.