Gambling is starting to become an issue in texas. Casinos state past research has shown less than 5% of all gamblers "have a problem". You are a little skeptical of this research and would like to test its voracity. You visit the two largest casinos in the Dallas area and ask people as they enter the casino if they "have a problem You end up asking 100 people, and 10% indicate they have a problem. Using a 1% level of significance, you test if the percentage of problem gamblers is greater than 5%.