# For 41 cities in the United S

Anonymous

Question description

For 41 cities in the United States, the following 7 variables were recorded: Y:  Sulphur dioxide content of air in micrograms per cubic meter (SO2) X1: Average annual temperature in degrees F (Temp) X2: Number of manufacturing enterprises employing 20 or more workers (Manuf) X3: Population size in thousands (Pop) X4: Average annual wind speed in miles per hour (Wind) X5: Average annual precipitation in inches (Precip) X6: Average number of days with precipitation per year (Days) This data has been collected to investigate the determinants of air pollution. (a)  Look at the correlation matrix of all the explanatory variables. Which two explanatory variables are so highly correlated that they may give cause for concern? (b)  Now conduct a regression analysis using all theexplanatory variables. If using StatCrunch store the standardized residuals and the predicted values. Interpret in detail your printout. (c)  Examine the residual plots (or construct a residual plot of the standardized residuals and the predicted values if using StatCrunch). What do the plots indicate? (d) Look at the standardized residuals for each city. You will notice from these and your plots that two cities stand out in the model fit as being outliers. Locate these cities and comment. (e) Using the information in the ANOVA table (part b) and the correlation matrix (part a) comment on if any variables should be eliminated from the regression model.

(Top Tutor) Studypool Tutor
School: UCLA
Studypool has helped 1,244,100 students
flag Report DMCA

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors