Case analysis: lucy v. zehmer
December 21, 2021
Principle of personal care | nursing | Harvard University
December 21, 2021

Project Week 7

For these project assignments throughout the course you will need to reference the data in the ROI Excel spreadheet. Download it here.

Using the ROI data set:

For each of the two majors:

1. Draw the scatter diagram of Y = â€˜Annual % ROIâ€ against X = â€˜Costâ€ .
2. Obtain b0 and b1 of the regression equation defined as y Ì‚ = b0 + b1X and the coefficient of determination (r2) from the Excel regression output.
3. Draw the fitted regression line on the scatter diagram.
4. Calculate the estimated â€˜Annual % ROIâ€ when the â€˜Costâ€ (X) is \$160,000.
5. Test the hypothesis:
• H0: Î²1 = 0
• Ha: Î²1 â‰  0
6. 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.

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