Exam 11: Analysis of Quantitative Data

Discuss the concepts of control variables and trivariate tables.What are three limitations of trivariate tables?

Refer to the information in the following table when answering questions 18 to 26: $\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\text { Annual Family Income and Education }$ $\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\text { Statistics for Three Neighborhoods }$ GLENBROOK MEADOWBROOK ELMBROOK Income Education Income Education Income Education Mean \ 78,000 17 Years \ 28,000 15 Years \ 16,000 11 Years Median \ 27,000 18 \ 28,000 16 \ 18,000 11 Mode \ 26,000 20 \ 28,000 11 \ 12,000 11 Stand Dev. \ 8,000 3 \ 2,000 6 \ 3,000 1.0 (N) (300) (300) (300) $\quad$$\quad$$\quad$$\quad$$\text { * } 4 \text { yrs college }=16 \text { yrs; masters } / \text { law degrees }=18 \mathrm{yrs} ; \mathrm{PhD} / \mathrm{MD} \text { degrees }=20 \mathrm{yrs} \text {. }$ -Which neighbourhood(s)has an income distribution resembling a normal curve? $\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\text { Annual Family Income and Education }$ $\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\text { Statistics for Three Neighborhoods }$ GLENBROOK MEADOWBROOK ELMBROOK Income Education Income Education Income Education Mean \ 78,000 17 Years \ 28,000 15 Years \ 16,000 11 Years Median \ 27,000 18 \ 28,000 16 \ 18,000 11 Mode \ 26,000 20 \ 28,000 11 \ 12,000 11 Stand Dev. \ 8,000 3 \ 2,000 6 \ 3,000 1.0 (N) (300) (300) (300) $\quad$$\quad$$\quad$$\quad$$\text { * } 4 \text { yrs college }=16 \text { yrs; masters } / \text { law degrees }=18 \mathrm{yrs} ; \mathrm{PhD} / \mathrm{MD} \text { degrees }=20 \mathrm{yrs} \text {. }$

Refer to the information in the following table when answering questions 18 to 26: $\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\text { Annual Family Income and Education }$ $\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\text { Statistics for Three Neighborhoods }$ GLENBROOK MEADOWBROOK ELMBROOK Income Education Income Education Income Education Mean \ 78,000 17 Years \ 28,000 15 Years \ 16,000 11 Years Median \ 27,000 18 \ 28,000 16 \ 18,000 11 Mode \ 26,000 20 \ 28,000 11 \ 12,000 11 Stand Dev. \ 8,000 3 \ 2,000 6 \ 3,000 1.0 (N) (300) (300) (300) $\quad$$\quad$$\quad$$\quad$$\text { * } 4 \text { yrs college }=16 \text { yrs; masters } / \text { law degrees }=18 \mathrm{yrs} ; \mathrm{PhD} / \mathrm{MD} \text { degrees }=20 \mathrm{yrs} \text {. }$ -Which neighbourhood(s)has the greatest differences in family income? $\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\text { Annual Family Income and Education }$ $\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\text { Statistics for Three Neighborhoods }$ GLENBROOK MEADOWBROOK ELMBROOK Income Education Income Education Income Education Mean \ 78,000 17 Years \ 28,000 15 Years \ 16,000 11 Years Median \ 27,000 18 \ 28,000 16 \ 18,000 11 Mode \ 26,000 20 \ 28,000 11 \ 12,000 11 Stand Dev. \ 8,000 3 \ 2,000 6 \ 3,000 1.0 (N) (300) (300) (300) $\quad$$\quad$$\quad$$\quad$$\text { * } 4 \text { yrs college }=16 \text { yrs; masters } / \text { law degrees }=18 \mathrm{yrs} ; \mathrm{PhD} / \mathrm{MD} \text { degrees }=20 \mathrm{yrs} \text {. }$

Define the following terms -measure of association

Education Level of Offender Level of Violence 0-8 Yrs 9-12 Yrs 13-16 Yrs 17+ Yrs High 80\% 40\% 10\% 5\% Medium 10\% 50\% 20\% 10\% Low 10\% 10\% 70\% 85\% Total 100\% 100\% 100\% 100\% () (400) (500) (300) (200) -How many individuals with 17+ years of education engaged in a level of violence defined as medium?

Which of the following tells how well a set of variables explains a dependent variable?