The value of the sample correlation coefficient R, for these data is approximately 0.712. Answer the following, carrier, intermediate, computations to at least four decimal places, and rounder answers as specified below. a. What is the value of the slope of the least squares regression line f
The value of the sample correlation coefficient R, for these data is approximately 0.712. Answer the following, carrier, intermediate, computations to at least four decimal places, and rounder answers as specified below. a. What is the value of the slope of the least squares regression line f
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
The value of the sample
a. What is the value of the slope of the least squares regression line for these data? round your answer to at least two decimal places.
b. What is the value of the y-intercept of the least squares regression line for these data? Round your answer to at least two decimal places.
Transcribed Image Text: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.
Campaign cost, x
(in millions of dollars)
3.30
2.05
1.36
2.11
3.65
1.51
2.95
2.27
3.95
1.66
3.36
3.08
esc
Explanation
TOSHIBA
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Check
2
W
a
Increase in sales, y
(percent)
6.54
# 3
e
6.50
6.39
6.74
6.77
6.63
6.57
6.65
6.99
6.23
6.81
6.92
C
A
$
4
r
%
45
Increase in sales
(percent)
6.6-
Figure 1
t
Campaign cost
(in millions of dollars)
6
0
Oll
Y
&
7
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