g The New England Journal of Medicine reported an experiment to judge the efficacy of surgery on men diagnosed with prostate cancer. They randomly assigned 230 men in the study to have surgery and 31 of them eventually died of prostate cancer. Additionally, they assigned 189 men in the study to not have surgery and 16 of them died of prostate cancer. If you were asked to determine if there any evidence to suggest that the surgery lowered the proportion of those who died of prostate cancer, what is the value of the test statistic you would use