Practice Quiz 91. What is the definition of Type I error?
2. Do less Republicans (group A) than Democrats (group B) favor the government investing billions of dollars to improve the country's train system? One thousand Republicans and one thousand Democrats were asked if they favored spending billions to improve the country's train system. How would we write thealternative hypothesis?
3. In 2012, Gallup asked participants if they had exercised more than 30 minutes a day for three days out ofthe week. Suppose that random samples of 100 respondents were selected from both Vermont and Hawaii. From the survey, Vermont had 65.3% who said yes and Hawaii had 62.2% who said yes. What is the value of the sample proportion of people from Hawaii who exercised for at least 30 minutes a day 3 days a week?