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The Perotti Pharma Company is investigating the relationship between advertising expenditures and the sales of some over-the-counter...

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Basic Math

The Perotti Pharma Company is investigating the relationshipbetween advertising expenditures and the sales of someover-the-counter (OTC) drugs.

The following data represents a sample of 10 common OTC drugs.Note that AD = Advertising dollars in millions and S = Sales inmillions $.

ADS
2264
2574
2982
3590
38100
42120
46120
52130
65150
88230

1. What is the equation of the regression line?

2. Interpret the slope in the context of the problem.

3. Find the coefficient of determination.

4. Interpret the meaning of R2 in the context of theproblem.

5. State the hypotheses to test for the significance of theregression equation.

6. Is there a significant relationship between dependent andindependent variables at alpha=0.05? Why?

7. Create a 95% confidence interval for Sales if Advertisingdollars = $50 million and interpret its meaning.

8. Paste the table with the results of regression analysis.

Answer & Explanation Solved by verified expert
3.8 Ratings (713 Votes)
8The table    See Answer
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