15. What is the mean value of weekly consumption expenditure (Y) and weekly family income (X)? A. 29520 and 260000 B. 57200 and 550.6667 C. 23.3333 and 420 D. 15.3333 and 130
15. What is the mean value of weekly consumption expenditure (Y) and weekly family income (X)? A. 29520 and 260000 B. 57200 and 550.6667 C. 23.3333 and 420 D. 15.3333 and 130
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:4
Answer Question 15-26 based on the information below:
Table 1 gives data on weekly consumption expenditure (Y - in dollars) and weekly family
income (X - in dollars).
15.
16.
CONFIDENTIAL
17.
18.
19.
20.
21.
23.
24.
A. 29520 and 260000
B. 57200 and 550.6667
C. 23.3333 and 420
D. 15.3333 and 130
26.
What is the mean value of weekly consumption expenditure (Y) and weekly family
income (X)?
A. 0.0979
B. 0.2415
C. 2.6061
D. 4.6515
A. 0.0979
B. 0.2415
C. 2.6061
D. 4.6515
Y
4
7
8
10
13
What is the value of Ex² and Ey², given that x₁ = X₁ X while y₁=Y-Y?
A. 29520 and 260000
B. 57200 and 550.6667
C. 23.3333 and 420
D. 15.3333 and 130
What is the value of Y and Σe, given that Y₁ = b₁ + b₂X, while e = Y₁-₁?
A. 184 and 0
B. 184 and 2.4149
C. 15.3333 and 0
D. 15.3333 and 2.4149
A. 16.3124
B. 18.2704
15
17
Based on the method of Ordinary Least Squares (OLS), what is the value of intercept
(b₁)?
18
20
22
24
26
A. 0.0021
B. 0.0915
C. 0.2415
D. 0.3025
Based on the method of Ordinary Least Squares (OLS), what is the value of slope
coefficient (b₂)?
CONFIDENTIAL
3/10
B. 0.0915
C. 0.2415
D. 0.3025
X
20
40
60
80
100
120
140
160
180
200
220
240
What is the predicted value of weekly consumption expenditure (1) when weekly
family income (X) is $200?
C. 20.2284
D. 22.1865
What is the variance for the intercept (o,)?
A. 0.0979 and 2.2280
B. 2.6061 and 2.2280
C. 8.6166 and 2.2280
D. 47.6474 and 2.2280
What is the standard error for the slope coefficient (o)?
A. 0.0021
4/10
BT22203
What is the estimated variance (82) and standard error (a) of the residual?
A. 0.0021 and 0.4914
B. 0.0915 and 7.1322
C. 0.2415 and 0.4914
D. 0.3025 and 7.1322
25. Based on two-tail test of significance, what is the value of t-statistics and t-critical for
b₂ at 5 percent significance level?
BT22203
A. Yes, because absolute value of t-statistics is larger than t-critical
B. Yes, because absolute value of t-statistics is smaller than t-critical
At 5 percent significance level, does weekly family income (X) is statistically significant
in explaining the movement of weekly consumption expenditure (Y).
C. No, because absolute value of t-statistics is larger than t-critical
D. No, because absolute value of t-statistics is smaller than t-critical
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