Write the null and alternative hypotheses, and identiiv which is the claim. 1. The mean age oi bus drivers in Chicago is 50.9 years. 2. The mean score tor all NBA games during a particular season was less than 100 points per game. 3. The dean of a major university claims that the mean time for students to earn a Master's degree is at most 3.5 years. 4. A candidate for governor of a particular state claims to be favored by at least half of the voters. Determine whether the hypothesis test is left-tailed. right-toiled. or two-toiled. 5. Ho: [1 2 30% and Hg: p I: 30% *5. A researcher claims that 73% of voters favor gun control. 7. A car maker claims that its new subcompact cor gets better than 47 miles per gallon on the highway