What is the slope of the least-squares regression line for these data? Carry your intermediate computations to at least four decimal places and round your answer to at least two 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
icon
Related questions
icon
Concept explainers
Question
100%

What is the slope of the least-squares regression line for these data? Carry your intermediate computations to at least four decimal places and round your answer to at least two decimal places. 

Campaign
Increase in
cost, x
sales, y
(percent)
ху
(in millions of
dollars)
y
4.05
6.97
28.2285
7.2+
1.34
6.39
8.5626
7+
1.69
6.19
10.4611
6.8+
2.30
6.63
15.249
6.6+
3.96
6.78
26.8488
6.4+
2.10
6.39
13.419
6.2+
1.94
6.77
13.1338
6.
3.09
6.94
21.4446
1.5
2.5
3
4
1.72
6.60
11.352
Campaign cost
(in millions of dollars)
3.12
6.59
20.5608
2.85
6.65
18.9525
Figure 1
3.77
6.86
25.8622
Increase in sales
(percent)
Transcribed Image Text:Campaign Increase in cost, x sales, y (percent) ху (in millions of dollars) y 4.05 6.97 28.2285 7.2+ 1.34 6.39 8.5626 7+ 1.69 6.19 10.4611 6.8+ 2.30 6.63 15.249 6.6+ 3.96 6.78 26.8488 6.4+ 2.10 6.39 13.419 6.2+ 1.94 6.77 13.1338 6. 3.09 6.94 21.4446 1.5 2.5 3 4 1.72 6.60 11.352 Campaign cost (in millions of dollars) 3.12 6.59 20.5608 2.85 6.65 18.9525 Figure 1 3.77 6.86 25.8622 Increase in sales (percent)
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
is the product of the campaign cost and the percentage increase in sales for each of the twelve campaigns. (These products, written in the
column labelled "xy", may aid in calculations.)
Transcribed Image Text: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 is the product of the campaign cost and the percentage increase in sales for each of the twelve campaigns. (These products, written in the column labelled "xy", may aid in calculations.)
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 5 steps

Blurred answer
Knowledge Booster
Correlation, Regression, and Association
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman