Question Two The following table gives the experience (in years) and the number of computers sold during the previous three months by seven salespersons. Experience ( years) 4 12 6. 10 16 7 Computer sold {unit) 19 42 28 31 39 35 21 1) Determine both dependent and independent variables, and explain the expected relationship between them. 2) Calculate the correlation coefficient comment on the results. |Page1 3) Estimates the simple regression model and comment on the estimated coefficients. 4) Predict the number of computers sold during the past three months by salespersons with eleven years of experience.
Question Two The following table gives the experience (in years) and the number of computers sold during the previous three months by seven salespersons. Experience ( years) 4 12 6. 10 16 7 Computer sold {unit) 19 42 28 31 39 35 21 1) Determine both dependent and independent variables, and explain the expected relationship between them. 2) Calculate the correlation coefficient comment on the results. |Page1 3) Estimates the simple regression model and comment on the estimated coefficients. 4) Predict the number of computers sold during the past three months by salespersons with eleven years of experience.
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
Please answer points 3 and 4
![Formula Sheet
E,(x; – X)²
s2
%3D
n - 1
CV =
X 100
E(x; - X)2
S =
n - 1
-
Ztab
Z =
First quartile location = 1/4 (n+1)
Third quartile location= 3/4 (n+1)
Value of quartile= start + ratio * distance
ηΣ xy - ΣxΣy
Bo = Ÿ – ß,X
r =
VIηΣ x2-(Σ x)?] [n Σ y? - (Σν)?1
ηΣ xy -ΣxΣy
η Σ x2 - (Σ x)2
Simple linear regression model
Yi = Bo + B1ס + Uj
Where i = 1,2,...n
Estimated simple linear regression model
P = Bo + B,X,
%3D
Critical Values |Ztabl
0.001
0.005
0.010
0.025
0.050
0.100
|Ztabl
3.090
2.576
2.326
1.960
1.645
1.282
|Page 4](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0bb82111-dea9-4ff2-8edd-493bcb33bf32%2F2578717d-5852-46cd-b02a-ac4d35c769c6%2Fw1vkcpo_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Formula Sheet
E,(x; – X)²
s2
%3D
n - 1
CV =
X 100
E(x; - X)2
S =
n - 1
-
Ztab
Z =
First quartile location = 1/4 (n+1)
Third quartile location= 3/4 (n+1)
Value of quartile= start + ratio * distance
ηΣ xy - ΣxΣy
Bo = Ÿ – ß,X
r =
VIηΣ x2-(Σ x)?] [n Σ y? - (Σν)?1
ηΣ xy -ΣxΣy
η Σ x2 - (Σ x)2
Simple linear regression model
Yi = Bo + B1ס + Uj
Where i = 1,2,...n
Estimated simple linear regression model
P = Bo + B,X,
%3D
Critical Values |Ztabl
0.001
0.005
0.010
0.025
0.050
0.100
|Ztabl
3.090
2.576
2.326
1.960
1.645
1.282
|Page 4
Transcribed Image Text:Question Two
The following table gives the experience (in years) and the number of
computers sold during the previous three months by seven salespersons.
Experience ( years)
4
12
9.
6.
10
16
7
Computer sold {unit) 19
42
28
31
39
35
21
1) Determine both dependent and independent variables, and explain the
expected relationship between them.
2) Calculate the correlation coefficient comment on the results.
|Page1
3) Estimates the simple regression model and comment on the estimated
coefficients.
4) Predict the number of computers sold during the past three months by
salespersons with eleven years of experience.
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