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According to Divorce Magazine.com, Infoplease, and Americans for Divorce Reform, approximately 49% of all marriages in the United States end in divorce. Belarus has the highest divorce rate (68%) while Sri Lanka has the lowest (0.15%). Many factors contribute to divorce, for example, religion, occupation, and expectations. In a recent survey, American adults were asked to name the most important issue to discuss before marriage. The proportion of adults who indicated each issue is given in the following table.
Children
Finances
Religion
Work-life Issues
Others
0.36
0.32
0.19
0.07
0.06
Source: Findlaw.com as reported by Stuckey and Kereselidze for USA Today, December 12, 2005.
a) Construct a bar chart and a pie chart for these data using the proportions in the table.
b) Suppose 1002 adults participated in the survey. Find the frequency for each issue - that is the number of adults who indicated each key issue.
c) Which type of chart is more effective in presenting these data? Justify your response.
The time interval between services at the station follow exponential distribution and as such the mean time taken to serve a unit is 5 minutes. What is the expected average queue length?
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