Math Solutions

(Steps Shown) A study was made by a retail merchant to determine the relation between weekly advertising expenditures and sales. The following data was

Question: A study was made by a retail merchant to determine the relation between weekly advertising expenditures and sales. The following data was recorded:

advertising costs( $) sales($)
40 385
20 400
25 395
20 365
30 475
50 440
40 490
20 420
50 560
40 525
25 480
50 510
  1. Plot a scatter diagram
  2. Find the equation of the regression line to predict weekly sales from advertising expenditures
  3. Estimate the weekly sales when advertising costs are $35.
  4. Plot the residuals vs. advertising costs. Comment

Price: $2.99
Solution: The downloadable solution consists of 4 pages
Deliverable: Word Document


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