Consider the following example: A recent drug survey showed an increase in the use of drugs and alcohol among local high school seniors as compared to the national percent. Suppose that a survey of 100 local seniors and 100 national seniors is conducted to see if the proportion of drug and alcohol use is higher locally than nationally. Locally, 65 seniors reported using drugs or alcohol within the past month, while 60 national seniors reported using them. Test the claim at a 1% level of significance. The type of parameter in this problem is a . The problem involves . The goal is to . The normality criteria for the sampling distribution is satisfied because