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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
Crime rate and income Refer to the previous exercise. MINITAB reports the results below for the multiple regression of y = crime rate on x1 = median income (in thousands of dollars) and x2 = urbanization. Results of regression analysi
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a. Report the prediction equations relating crime rate to income at urbanization levels of (i) 0 and (ii) 100. Interpret
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b. For the bivariate model relating y = crime rate to x = income, MINITAB reports
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Interpret the effect of income, according to the sign of its slope. How does this effect differ from the effect of income in the multiple regression equation?
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c. The correlation matrix for these three variables is shown in the table. Use these correlations to explain why the income effect seems so different in the models in part a and part b.
d. Do these variables satisfy Simpson’s paradox? Explain
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