You actually wouldn't need any stats classes to do this particular analysis, the sample sizes are quite large. You only need to know four values, the size of th

You actually wouldn't need any stats classes to do this particular analysis, the sample sizes are quite large. You only need to know four values, the size of the groups of all vaccinated or unvaccinated, and the numerators, the number of incidents of cancer in both groups, to determine if there is a difference in the incidence rate between the two populations.