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 (denoted by x, in millions of dollars) and the resulting percentage increase in sales (denoted by ») following the campaign, were presented by the firm. A scatter plot of the data is shown in Figure 1. Also given are the products of the values for campaign cost and values for percentage increase in sales for each of the twelve campaigns. (These products, written in the column labelled "sy," may aid in calculations.) Campaign cost, Increase in sales, y (percent) (in milions of dollars) 3.71 6.73 24.9683 3.84 7.03 26.9952 2.18 6.40 13.952 3.06 6.94 21.2364 3.27 6.55 21.4185 1.50 6.28 9.42 2.25 6.57 14.7825 2.00 6.77 13.54 1.47 6.63 9.7461 3.58 6.91 24.7378 1.31 6.41 8.3971 Figure 1 3.01 6.59 19.8359 Send data to Excel Answer the following. Carry your intermediate computations to at least four decimal places, and round your answer as specified below. (If necessary, consult a list of formulas.) What is the value of the samele.correlation.coefficient for these data? Round your answer to at least three decimal places.
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 (denoted by x, in millions of dollars) and the resulting percentage increase in sales (denoted by ») following the campaign, were presented by the firm. A scatter plot of the data is shown in Figure 1. Also given are the products of the values for campaign cost and values for percentage increase in sales for each of the twelve campaigns. (These products, written in the column labelled "sy," may aid in calculations.) Campaign cost, Increase in sales, y (percent) (in milions of dollars) 3.71 6.73 24.9683 3.84 7.03 26.9952 2.18 6.40 13.952 3.06 6.94 21.2364 3.27 6.55 21.4185 1.50 6.28 9.42 2.25 6.57 14.7825 2.00 6.77 13.54 1.47 6.63 9.7461 3.58 6.91 24.7378 1.31 6.41 8.3971 Figure 1 3.01 6.59 19.8359 Send data to Excel Answer the following. Carry your intermediate computations to at least four decimal places, and round your answer as specified below. (If necessary, consult a list of formulas.) What is the value of the samele.correlation.coefficient for these data? Round your answer to at least three decimal places.
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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Transcribed Image Text:11:12
AA
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O REGRESSION AND CORRELA
Computing the sample.
OD O DO
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
(denoted by x, in millions of dollars) and the resulting percentage
increase in sales (denoted by y) following the campaign, were presented
by the firm. A scatter plot of the data is shown in Figure 1. Also given
are the products of the values for campaign cost and values for
percentage increase in sales for each of the twelve campaigns. (These
products, written in the column labelled "xy," may aid in calculations.)
Campaign cost,
Increase in
sales, y
(percent)
xy
(in milions o
dollars)
3.71
6.73
24.9683
72
3.84
7.03
26.9952
2.18
6.40
13.952
3.06
6.94
21.2364
3.27
6.55
21.4185
1.50
6.28
9.42
2.25
6.57
14.7825
2.00
6.77
13.54
1.47
6.63
9.7461
3.58
6.91
24.7378
1.31
6.41
8.3971
Figure 1
3.01
6.59
19.8359
Send data to Excel
Answer the following. Carry your intermediate computations to at least
four decimal places, and round your answer as specified below. (If
necessary, consult a list of formulas.)
What is the value of the sample.correlation coefficient
for these data? Round your answer to at least three
decimal places.
?
Explanation
Check
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