Nationality Discrimination Refugees make up about 20% of the population in a country.
However, only 3% of the 1500 applications rejected by an employment agency are those of refugees.
Experts might argue that if the agency hired people regardless of their nationality, the distribution of nationalities would be the same as though they had hired people at random from the country's population.
Check whether the conditions for using the one-proportion z-test are met.