For the sales regression in the very previous question, What is the numerical value of b0, or the sample intercept coefficient for the sales regression? The data is reproduced above for your convenience.  Also, here is the sample regression function that you should get values for….   Yi = b0 + b1Xi + ei where Yi = sales (in millions) and Xi = advertising expenditures (in millions)

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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Fall 2020 

 

 

 

Yi_sales

Xi_advert

Xi*Yi

Xi2

Predicted Yi_sales

Residuals

Residuals2

700

8

5600

64

626.6307

31.36929

984.0326

560

2

1120

4

292.4166

267.5834

71600.89

1000

13

13000

169

892.8691

47.13091

2221.323

302

5.8

1751.6

33.64

513.3378

-166.338

27668.26

100

2.1

210

4.41

303.7459

-179.746

32308.57

 

 

21681.6

275.05

   

134783.1

y-bar =

532.4

       

 

x-bar =

6.18

 

 

 

 

 

 

Question 14.  For the sales regression in the very previous question, What is the numerical value of b0, or the sample intercept coefficient for the sales regression? The data is reproduced above for your convenience.  Also, here is the sample regression function that you should get values for….

 

Y= b0 + b1Xi + ei

where Y= sales (in millions) and X= advertising expenditures (in millions)

 

a) 

a.          around 62  

 

b) 

b.         around -71 

 

c) 

c.          around 70 

 

d) 

d.         around 148

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