Compare two groups who have received different treatments gr

Compare two groups who have received different treatments, group A: radiation, group B: chemotherapy.

4 persons out of 10 in group B survived longer than 1 year, while none of the 5 persons in group A survived longer than 1 year.

Test wether treatment affects one year survival at the 5% significance level using the Fisher exact test! (In the solution my teacher has calculated a p-value, but how can you calculate a p-value from a contingency table?)

Solution