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2-4 example12 - Student Grady Simonton Course Math119...

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Unformatted text preview: Student: Grady Simonton Course: Math119: Elementary Statistics - Spring 2.010 - CRN: 49239 Instructor: Shawn Parvini - 16 weeks Date: 2/18/10 Book: Triola: Elementary Statistics, 11e Time: 11:13 ANI The following table lists the marriage and divorce rates per 1000 people in a particular country for selected years since 1900. Construct a multiple bar graph of the data. Why do these data consist of marriage and divorce rates rather than total numbers of marriages and divorces? Comment on any trends that you observe in these rates, and give explanations for these trends. Year 1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 Marriage m-“mmmmm 11.0 3.1 0.7 1.0 1.5 1.5 2.0 2.6 2.1 3.5 5.1 Divorce 4.7 4.2 A bar graph uses bars of equal width to show frequencies of categories of qualitative data. The vertical scale represents frequencies or relative frequencies. The horizontal scale identifies the different categories of qualitative data. A multiple bar graph has two or more sets of bars, and is used to compare two or more data sets. The bars may or may not be separated by small gaps. Construct a multiple bar graph of the data. The multiple bar graph is shown below. 00 10 20 30 40 50 60 T0 80 90 00 I Marriage I Divorce Year Why do these data consist of marriage and divorce rates rather than total numbers of marriages and divorces? Proportions should be used to show how a particular characteristic of a population changes over time. Determine whether there are any cases where providing the totals of a particular characteristic of a population over time differs in interpretation from the proportions. Comment on any trends that you observe in these rates, and give explanations for these trends. Refer to the multiple bar graph to determine the trends of marriage and divorce rates over time for the particular country. Think of a possible explanation for these trends. Page 1 ...
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