The table below presents the scores of 10 randomly selected cities on each of six variables: three measures of criminal activity and three measures of population structure. Crime rates are the number...


The table below presents the scores of 10 randomly selected cities on each of six variables: three measures of criminal activity and three measures of population structure. Crime rates are the number of incidents per 100,000 population. For each combination of crime rate and population characteristic:


a. Draw a scattergram and a freehand regression line.


b. Compute the slope (b) and find the Y intercept (a).


c. State the least-squares regression line. What homicide rate would you predict for a city with a growth rate of 21? What robbery rate would you predict for a city with a population density of 250? What auto theft rate would you predict for a city in which 50% of the population lived in the urban core?


d. Compute r and r2.


e. Since these cities come from a random sample, conduct a test of significance for both relationships.


f. Describe the strength and direction of each of these relationships in a sentence or two.



May 05, 2022
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