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Read, analyze and do what is asked. A study was made by a retail merchant to determine the relation between weekly advertising expenditures and sales. Advertising Costs ($) 40 20 25 20 30 50 40 20 50 40 25 50 Sales ($) 385 400 395 365 475 440 490 420 560 525 480 510 (a) Plot a scatter diagram. (b) Find the equation of the regression line to predict weekly sales from advertising expenditures. (show solutions) (c) Estimate the weekly sales when advertising costs are $35. Read, analyze and do what is asked. A study was made by a retail merchant to determine the relation between weekly advertising expenditures and sales. Advertising Costs ($) 40 20 25 20 30 50 40 20 50 40 25 50 Sales ($) 385 400 395 365 475 440 490 420 560 525 480 510 (a) Plot a scatter diagram. (b) Find the equation of the regression line to predict weekly sales from advertising expenditures. (show solutions) (c) Estimate the weekly sales when advertising costs are $35.
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Related Book For
Probability & Statistics for Engineers & Scientists
ISBN: 978-0130415295
7th Edition
Authors: Ronald E. Walpole, Raymond H. Myers, Sharon L. Myers, Keying
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