Data on civil strife (number of incidents), unemployment, and urbanization have been gathered for 10 nations. Take civil strife as the dependent variable. Compute the zero-order correlations among the three variables.

a. Compute the partial correlation coefficient for the relationship between strife (Y) and unemployment (X) while controlling for the effect of urbanization (Z). What effect does this have on the bivariate relationship? Is the relationship between strife and unemployment direct?
b. Compute the partial correlation coefficient for the relationship between strife (Y) and urbanization (X) while controlling for the effect of unemployment (Z). What effect does this have on the bivariate relationship? Is the relationship between strife and urbanization direct? (You will need this partial correlation to compute the multiple correlation coefficient.)
c. Find the unstandardized multiple regression equation with unemployment (X1) and urbanization (X2) as the independent variables. What level of strife would be expected in a nation in which the unemployment rate was 10% and where 90% of the population lived in urban areas?
d. Compute beta-weights for each independent variable.
Which has the stronger impact on civil strife?
e. Compute the multiple correlation coefficient (R) and the coefficient of multiple determination (R2).

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Number of Incidents Unemployment Population Living Percentage of in Urban Areas 60 of Civil Strife 10 23 25 26 30 53 5.3 1.0 2.7 2.8 3.0 2.5 6.0 5.2 7.8 9.2 貘) At) 75