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Determine what type of observational study is described. Explain. Researchers wanted to determine whether there was an association between high blood pressure and the suppression of emotions. The researchers looked at 1800 adults enrolled in a health initiative observational study. Each person was interviewed and asked about their response to emotions. In particular they were asked whether their current tendency was to express or to hold in anger and other emotions. The degree of suppression of emotions was rated on a scale of 1 to 10. Each person's blood pressure was also measured. The researchers analyzed the results to determine whether there was an association between high blood pressure and the suppression of emotions. O A. The observational study is a retrospective study because individuals are asked to look back in time. 0 B. The observational study is a cohort study because individuals are observed over a long period of time. 0 C. The observational study is a cross-sectional study because information is collected at a specic point in time. Parking at a large university has become a very big problem. University administrators are interested in determining the average parking time (e.g. the time it takes a student to nd a parking spot) of its students. An administrator inconspicuously followed 110 students and carefully recorded their parking times. Identify the sample of interest to the university administration. 0 A. The parking time of a student 0 B. The location of the parking spot 0 C. The parking times of the 110 students 0 D. The type of cars the students drive The accomapnying bar graph shows the political party affiliation of 1000 registered voters in a certain country. What percentage of the 1000 registered voters belonged to one of the traditional two parties (Democratic and Republican)? Click the icon to view the party affiliation bar graph. O 35% 40% O 25% O 75%H Ticket Sales Bar Graph Number of Tickets Sold Each Week 60 50 40 Number of Tickets Sold 30 20- 10 1 2 3 4 5 6 Week