# Using the ROI data set: For each of the two majors: Draw the scatter diagram

**Question description**

Using the ROI data set:

For each of the two majors:

- Draw the scatter diagram of Y = ‘Annual % ROI’ against X = ‘Cost’.
- Obtain b0 and b1 of the regression equation defined as y ̂ = b0 + b1X and the coefficient of determination (r2) from the Excel regression output.
- Draw the fitted regression line on the scatter diagram.
- Calculate the estimated ‘Annual % ROI’ when the ‘Cost’ (X) is $160,000.
- Test the hypothesis:
- H0: β1 = 0
- Ha: β1 ≠ 0

- Write a paragraph or more on any observations you make about the regression estimates, coefficient of determination, the plots, and the results of your hypothesis tests.

## Tutor Answer

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