a. Give the null and alternative hypotheses for testing the claim. b. An XLSTAT printout giving the test results is shown at the bottom of the page. Find and interpret the p-value of the test using a = .05. c. What assumptions about the data are required for the inference, part b, to be valid? Check these assumptions graphically using the data in the PBL file.
a. Give the null and alternative hypotheses for testing the claim. b. An XLSTAT printout giving the test results is shown at the bottom of the page. Find and interpret the p-value of the test using a = .05. c. What assumptions about the data are required for the inference, part b, to be valid? Check these assumptions graphically using the data in the PBL file.
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
![8.15 Performance-based logistics. Refer to the Journal of
Business Logistics (Vol. 36, 2015) study of the factors that
lead to successful performance-based logistics projects,
Exercise 2.45 (p. 71). Recall that opinions of a sample of
Department of Defense (DOD) employees and suppliers
were solicited during interviews. Data on years of experi-
ence for the 6 commercial suppliers interviewed and the
11 government employees interviewed are listed in the
accompanying table. Assume these samples were randomly
PBL
Summary statistics:
Variable
Observations Minimum Maximum
Mean
Std. deviation
Experience | Commercial
Experience | Government
6
5.0000
30.0000
12.3333
8.8694
11
3.0000
30.0000
20.8182
9.3682
t-test for two independent samples/Lower-tailed test:
95% confidence interval on the difference between the means:
(-Inf, -0.2951 )
Difference
-8.4848
t (Observed value)
t (Critical value)
-1.8162
-1.7531
DF
15
p-value (one-tailed)
alpha
0.0447
0.05
XLSTAT Output for Exercise 8.15](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7e3f63ca-8535-41c5-a553-0c5aae086941%2F0e72824f-c186-477e-a910-d7b709d424de%2Fvv75z8p_processed.png&w=3840&q=75)
Transcribed Image Text:8.15 Performance-based logistics. Refer to the Journal of
Business Logistics (Vol. 36, 2015) study of the factors that
lead to successful performance-based logistics projects,
Exercise 2.45 (p. 71). Recall that opinions of a sample of
Department of Defense (DOD) employees and suppliers
were solicited during interviews. Data on years of experi-
ence for the 6 commercial suppliers interviewed and the
11 government employees interviewed are listed in the
accompanying table. Assume these samples were randomly
PBL
Summary statistics:
Variable
Observations Minimum Maximum
Mean
Std. deviation
Experience | Commercial
Experience | Government
6
5.0000
30.0000
12.3333
8.8694
11
3.0000
30.0000
20.8182
9.3682
t-test for two independent samples/Lower-tailed test:
95% confidence interval on the difference between the means:
(-Inf, -0.2951 )
Difference
-8.4848
t (Observed value)
t (Critical value)
-1.8162
-1.7531
DF
15
p-value (one-tailed)
alpha
0.0447
0.05
XLSTAT Output for Exercise 8.15
![and independently selected from the populations of DOD
employees and commercial suppliers. Consider the follow-
ing claim: "On average, commercial suppliers of the DOD
have less experience than government employees."
Commercial:
Government:
30 10 9
15 30 30 25
10 5
10
6.
3 20 25 30 20 25
a. Give the null and alternative hypotheses for testing the
claim.
b. An XLSTAT printout giving the test results is shown at
the bottom of the page. Find and interpret the p-value
of the test using a = .05.
c. What assumptions about the data are required for the
inference, part b, to be valid? Check these assumptions
graphically using the data in the PBL file.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7e3f63ca-8535-41c5-a553-0c5aae086941%2F0e72824f-c186-477e-a910-d7b709d424de%2Fdvdyqdl_processed.png&w=3840&q=75)
Transcribed Image Text:and independently selected from the populations of DOD
employees and commercial suppliers. Consider the follow-
ing claim: "On average, commercial suppliers of the DOD
have less experience than government employees."
Commercial:
Government:
30 10 9
15 30 30 25
10 5
10
6.
3 20 25 30 20 25
a. Give the null and alternative hypotheses for testing the
claim.
b. An XLSTAT printout giving the test results is shown at
the bottom of the page. Find and interpret the p-value
of the test using a = .05.
c. What assumptions about the data are required for the
inference, part b, to be valid? Check these assumptions
graphically using the data in the PBL file.
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