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Unformatted text preview: Sociology 549, Paul von Hippel, Autumn 2004 Midterm questions (53 points) Time allotted: 90 minutes Clock yourself! Please write your name and answers on the answer sheet provided—not on this question sheet. 1. (4½ points) During the week of March 7, 1997, Philadelphia police pulled over 262 drivers. Although Philadelphia is mostly white, whites made up only 14.1% of the drivers who were pulled over. 79.0% of the drivers pulled over were black, 2.7% were Latino, and 4.2% were Asian. ( Source . Data from Philadelphia Police Department, compiled by Jeannine Sims.) a. (2½ points) Suppose you work for a civil rights advocacy group. Draw a pie chart that emphasizes how many of the drivers pulled over were black. Explain what you have done to emphasize black drivers. White Black Latino Asian 1 point for a 3-D pie chart 1 point if blacks are in front. ½ point if the front wedge is highlighted using color or shading. b. (2 points) Under pressure, the police changed their behavior. By the week of October 6, 1997, black drivers were involved in just 44.5% of traffic stops. Suppose you work for the police department. Draw a time series that emphasizes the decline in black pullovers from March to October. Explain what you have done to emphasize this decline. 40% 45% 50% 55% 60% 65% 70% 75% 80% Mar-98 Oct-98 1 point if it’s tall and skinny. 1 point if it starts above zero. 2. (26½ points) In assessing the impact of possible discrimination by traffic cops, it is important to know how often black drivers are pulled over. The table below describes a random sample of 9,415 black Americans who are old enough to drive, giving the number of times that each of them was pulled over (stopped) by police in 1999. ( Source . Contacts Between Police and the Public: Findings from the 1999 National Survey.) a. (2 points) Complete the table by filling in the percentages and cumulative percentages. 1 point for each column: Number of stops Number of drivers % c% 0 8257 87.70% 87.70% 1 867 9.21% 96.91% 2 173 1.83% 98.75% 3 51 0.54% 99.29% 4 28 0.30% 99.58% 5 or more 39 0.42% 100.00% b. (4 points) Interpret in a couple of sentences all of the numbers in the gray row, including the percentage and cumulative percentage....
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