Patterns And Modeling

Respond to the following in a minimum of 175 words:

Models help us describe and summarize relationships between variables. Understanding how process variables relate to each other helps businesses predict and improve performance. For example, a marketing manager might be interested in modeling the relationship between advertisement expenditures and sales revenues.

Consider the dataset below and respond to the questions that follow:

Advertisement ($’000) Sales ($’000)

1068 4489

1026 5611

767 3290

885 4113

1156 4883

1146 5425

892 4414

938 5506

769 3346

677 3673

1184 6542

1009 5088

Construct a scatter plot with this data.
Do you observe a relationship between both variables?
Use Excel to fit a linear regression line to the data. Show the fitted regression model? (Hint: You can follow the steps outlined on page 497 of the textbook.)
What is the slope? What does the slope tell us? Is the slope significant?
What is the intercept? Is it meaningful?
What is the value of the regression coefficient? What is the value of the coefficient of determination, r^2? What does r^2 tell us?
Use the model to predict sales and the business spends $950,000 on the advertisement. Does the model underestimate or overestimates ales?
Note: If you find the cutting and pasting in Blackboard is not working, you can attach the Excel page on which you constructed the scatter and the linear regression; however, the responses to the 4th through 7th questions must be posted on the discussion board and not as an attachment. Please be careful when you are attaching the Excel page, and make sure that it is your work, even if accidentally you post someone else’s page, I am required by the University to report it as plagiarism. University has a strict policy on plagiarism and the hassle a student goes through for plagiarism is not worth it.

 

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