QMB 3200 Summer 2023 Homework 6 Complete your work in this document in black type. Leave the existing document in the blue type it is currently in and do not edit the document except to add your responses below each prompt. You will use your student data set (cars) to run all analyses in Statistix 10. Printout

QMB 3200 Summer 2023 Homework 6
Complete your work in this document in black type. Leave the existing document in the blue type it is currently in and do not edit the document except to add your responses below each prompt. You will use your student data set (cars) to run all analyses in Statistix 10. Printouts/output must be included; without them your grade will be zero.

If an item asks for an “interpretation,” state your response in the words used in the lecture slides. See Lecture 9.

If you were done with your model testing at the end of HW5, include a snapshot of your final Printout (Interaction Test) below. If you still had further testing to do, complete the process and insert Printouts below. (For grading reference only, not for credit, however 5 pts will be deducted if not included).

1. Use the values from the Printout of your best model (above) and write the prediction equation (use numbers, not betas). (5 pts.)
ŷ =

2. Interpret the R2 associated with your best model. (4 pts)

3. Interpret the 2s associated with your best model. (4 pts)

4. Using your best model, create a prediction interval and a fitted interval for observation #15. Insert the Printout. (4 pts)

5. Interpret the prediction interval. (4 pts.)

6. Interpret the fitted interval. (4 pts.)

7. Would you use your model in practice? Why or why not? Provide at least two items of information discussed in the lecture to support your view. (5 points)