Question: The NewYorkTimes ran an article about a study in which Professor Denise Komiewicz & other Johns Hopkins researchers subjected laboratory gloves to stress. Among 250 vinyl gloves, 63 percent leaked viruses. Among 250 latex gloves, 7 percent leaked viruses. Using 95 percent confidence interval test a claim that Viny gloves have a larger virus leak rate than latex gloves. Basically you need to answer the following questions.
[A] What is the test statistics?