Suppose you are getting ready to run a two-proportion z-test to see whether students who have studied statistics are more likely to always wear seat belts in a car than those who haven’t studied statistics. You find that 90 out of 100 students who have studied statistics always wear a seat belt and 85 out of 100 who haven’t studied statistics always wear a seat belt. You need to first check the validity conditions. How many successes and how many failures do you have in each of your groups? Do those numbers meet the validity condition?