A psychologist studying perceived “quality of life” in a large number of cities (N 5 150)

came up with the following equation using mean temperature (Temp), median income in

$1000 (Income), per capita expenditure on social services (Socser), and population density

(Popul) as predictors.

a. Interpret the regression equation in terms of the coefficients.

b. Assume there is a city that has a mean temperature of 55 degrees, a median income of

$12,000, spends $500 per capita on social services, and has a population density of 200 people per block. What is its predicted quality of life score?

3Y N = 5.37 2 0.01Temp 1 0.05Income 1 0.003Socser 2 0.01Popul4

c. What would we predict in a different city that was identical in every way except that it spent $100 per capita on social services?