An advertising firm wishes to demonstrate to its clients the effectiveness of the advertising campaigns it has conducted. The following bivariate data on twelve recent campaigns, including the cost of each campaign (in millions of dollars) and the resulting percentage increase in sales following the campaign, were presented by the firm. Based on these data, we would compute the least-squares regression line to be y = 6.27+0.15x, with x representing campaign cost and y representing the resulting percentage increase in sales. (This line is shown below, along with a scatter plot of the data.) Campaign cost, x (in millions of dollars) Increase in sales, y (percent) 3.74 6.76 3.17 6.50 2.86 6.64 2.10 6.55 2,00 6.77 1.57 6.68 2.38 6.61 3.77 6.88 1.63 6.28 3.65 6.84 3.05 7.00 Campaign cost (in millions of dollars) 1.32 6.40 Send data to calculator Send data to Excel Based on the firm's data and the regression line, answer the following. (a) From the regression equation, what is the predicted percentage increase in sales when the advertising campaign cost is 3.77 million dollars? Round your answer to two or more decimal places. Increase in sales (quaɔjad)

An advertising firm wishes to demonstrate to its clients the effectiveness of the advertising campaigns it has conducted. The following bivariate data on twelve recent campaigns, including the cost of each campaign (in millions of dollars) and the resulting percentage increase in sales following the campaign, were presented by the firm. Based on these data, we would compute the least-squares regression line to be y = 6.27+0.15x, with x representing campaign cost and y representing the resulting percentage increase in sales. (This line is shown below, along with a scatter plot of the data.) Campaign cost, x (in millions of dollars) Increase in sales, y (percent) 3.74 6.76 3.17 6.50 2.86 6.64 2.10 6.55 2,00 6.77 1.57 6.68 2.38 6.61 3.77 6.88 1.63 6.28 3.65 6.84 3.05 7.00 Campaign cost (in millions of dollars) 1.32 6.40 Send data to calculator Send data to Excel Based on the firm's data and the regression line, answer the following. (a) From the regression equation, what is the predicted percentage increase in sales when the advertising campaign cost is 3.77 million dollars? Round your answer to two or more decimal places. Increase in sales (quaɔjad)

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question #25

An advertising firm wishes to demonstrate to its clients the effectiveness of the advertising campaigns it has conducted. The following bivariate data on twelve
recent campaigns, including the cost of each campaign (in millions of dollars) and the resulting percentage increase in sales following the campaign, were
presented by the firm. Based on these data, we would compute the least-squares regression line to be y = 6.27 + 0.15x, with x representing campaign cost and
y representing the resulting percentage increase in sales. (This line is shown below, along with a scatter plot of the data.)
00
Campaign cost, x
(in millions of dollars)
Increase in sales, y
(percent)
3.74
6.76
3.17
6.50
2.86
6.64
2.10
6.55
2.00
6.77
1.57
6.68
2.38
6.61
3.77
6.88
1.63
6.28
3.65
6.84
3.05
7.00
Campaign cost
(in millions of dollars)
1.32
6.40
Send data to calculator
Send data to Excel
Based on the firm's data and the regression line, answer the following.
(a) From the regression equation, what is the predicted percentage increase in sales when the advertising campaign cost
is 3.77 million dollars? Round your answer to two or more decimal places.
Increase in sales
(percent)

3.17
6.50
Español
2.86
6.64
2.10
6.55
2.00
6.77
1.57
6.68
圖
2.38
6.61
3.77
6.88
1.63
6.28
3.65
6.84
3.05
7.00
Campaign cost
(in millions of dollars)
1.32
6.40
Send data to calculator
Send data to Excel
Based on the firm's data and the regression line, answer the following.
(a) From the regression equation, what is the predicted percentage increase in sales when the advertising campaign cost
is 3.77 million dollars? Round your answer to two or more decimal places.
(b) What was the observed percentage increase in sales when the advertising campaign cost was 3.77 million dollars?
Increase in sales
(percent)

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