Question: A researcher is investigating whether non-white minorities commit a disproportionate number of homicides. He uses demographic data from Detroit, MI to compare homicide rates and the number of the population that are white males.

a. Use your calculator to construct a scatter plot of the data. What should the independent variable be? Why?

b. Use your calculator's regression function to find the equation of the least-squares regression line. Add this to your scatter plot.

c. Discuss what the following mean in context.

i. The slope of the regression equation

ii. The y-intercept of the regression equation

iii. The correlation r

iv. The coefficient of determination r2.

d. Do the data provide convincing evidence that there is a linear relationship between the number of white males in the population and the homicide rate? Carry out an appropriate test at a significance level of 0.05 to help answer this question