Public Opinion Survey Analysis

a. An explanation of what the data reveals. The Retting et al. article conducted public opinion surveys to evaluate whether the respondents of Oxnard, California “favor, oppose, or don’t know” about the use of cameras to enforce against red light running, as a supplement to police efforts. In Table 7, the researchers examined the responses 6 weeks before, 6 weeks after, and 6 months after to evaluate the differences in responses over time. Additionally, the researchers surveyed two groups, where one group was aware of the red light cameras while the other group was unaware of the red light cameras. The data results indicate that the residents of Oxnard, California favor the use of red light camera enforcement to supplement police …show more content…
How your visual representation of the data more clearly and effectively presents the information (e.g., the magnitude of a trend is now more easily understood)? A clustered bar graph showcases comparative values across a few categories. The cluster chart data presents changes over a period of time or illustrates comparisons among items. Furthermore, the clustered chart demonstrates specific scale arrangements, similar to a Likert scale. For example, Table 7 shows figures involving the survey responses either favoring, opposing or unsure about using cameras as enforcement against red light running in Oxnard, California as a supplement to police efforts.
Therefore, clustered bar graph, presented in the attached excel document, allows the reader to easily identify the categories (strongly favor, somewhat favor, somewhat oppose, strongly oppose, and don’t know) and the percentage of the respondents’ answers. In addition, the visual allows the reader to view the responses side by side to easily compare the data of the different categories over a period of time as well as the total percentage of the responses in each category. Moreover, the table chart shows the reader the information source for the clustered bar