Question
In: Statistics and Probability
An article presents an analysis of the profit of international construction projects. In a sample of...
An article presents an analysis of the profit of international construction projects. In a sample of 126 projects, the average profit margin (in percent) was 8.27 with a standard deviation of 16.33. A test is made of H0 : μ ≥ 10 versus H1 : μ < 10.
- Find the P-value. Round the answer to four decimal places.
This is what i have, but for some reason I'm being told it is wrong.
(8.27 - 10 ) / (16.33 / sqrt 126) = -1.879 - -> -1.88 -- > Z = .0301
- The P-value calculated for testing H0 : µ ≥ 10 versus H1 : µ < 10 is not a small probability, hence it is plausible that the mean profit margin is 10% or more. False.
Solutions
Expert Solution
Yes it is wrong, because population standard deviation is unknown therefore you can't use z test this problem we can solve using t test.
Dear student,
I am waiting for your feedback. I have given my 100% to solve your
queries. If you satisfied with my answer then please please like
this.
Thank You
orchestra answered 1 year agoRelated Solutions
The article presents an analysis of the current outlook of the highest court in the United...
The article presents an analysis of the current outlook of the
highest court in the United States. We often think of courts (and
especially the Supreme Court) as dispassionate and thoroughly
objective institutions. Yet as the text materials in Chapter One
discuss, there are various schools of jurisprudence, some of whom
try to examine the ways in which courts really operate. Robin
Conrad and Ralph Nader have opposed views on the current court that
appear prominently in the article.
Link...
An article presents voltage measurements for a sample of 66 industrial networks in Estonia. Assume the...
An article presents voltage measurements for a sample of 66
industrial networks in Estonia. Assume the rated voltage for these
networks is 232 V. The sample mean voltage was 231.5 V with a
standard deviation of 2.19 V. Let μ represent the
population mean voltage for these networks.
a) Find the P-value for testing H0 :
μ = 232 versus H1 : µ ≠ 232. Round the
answer to four decimal places.
b) Either the mean voltage is not equal...
An article presents voltage measurements for a sample of 66 industrial networks in Estonia. Assume the...
An article presents voltage measurements for a sample of 66
industrial networks in Estonia. Assume the rated voltage for these
networks is 232 V. The sample mean voltage was 231.5 V with a
standard deviation of 2.19 V. Let μ represent the
population mean voltage for these networks.
a) Find the P-value for testing H0 :
μ = 232 versus H1 : µ ≠ 232. Round the
answer to four decimal places.
b) Either the mean voltage is not equal...
Need to write a article analysis on latest new related to international business from major news...
Need to write a article analysis on latest new related to
international business from major news sources such as BBC, Wall
street journal, New York times etc. I have to analyze article on
latest news article related to international business. Such as
"Trade war and Iran tensions creating a ‘very unstable’ oil
market"
Case Scenario Analysis: Managing risks in construction projects has been recognized as a very important management...
Case Scenario Analysis:
Managing risks in construction projects has been recognized as a
very important management process in order to achieve the project
objectives in terms of time, cost, quality, safety and
environmental sustainability. A study aims to identify and analyze
the risks associated with the development of construction projects
from project stakeholder and life cycle perspectives. The study
identified following risk factors.
1.Tight project schedule
2.High performance/quality expectations
3.Low management competency of subcontractors
4.Incomplete or inaccurate cost estimate
5.Lack...
An article in Journal of Structural Engineering presents the results of an experiment that evaluated a...
An article in Journal of Structural Engineering
presents the results of an experiment that evaluated a standard
method for estimating the brace force for a truss. In a sample of
360 short test trusses the method underestimated the force for 45
of them, and in a sample of 400 long test trusses, the method
underestimated the force for 60 of them. Find a 95% confidence
interval for the difference between the underestimation rates for
long and short trusses.
The student will look for one (1) article that presents the topic of the Primary and...
The student will look for one (1) article that presents the
topic of the Primary and Secondary Financial Markets of the United
States.
Write a 350-word essay that distinguishes the functions of these
two (2) types of markets.
The student will look for one (1) article about the role of the
investment banker and the
different sources of capital that corporations have.
Write a 350 word essay where you evaluate the functions of
this
Participant of the financial markets.
Chapter 3 presents the concept of financial analysis through the use of ratios. The chapter presents...
Chapter 3 presents the concept of financial analysis through the
use of ratios. The chapter presents 13 ratios in four categories.
Briefly explain the four categories and discuss why they would be
important in making a stock purchase. In preparing your comments,
assume you have $10,000 to invest in the stock market and you are
trying to choose between companies in the same industry. How would
you use the ratios presented in chapter 3 to decide what stock to
purchase?...
1A.Based on an analysis of sample data, an article proposed the pdf f(x) = 0.25e−0.25(x −...
1A.Based on an analysis of sample data, an article proposed the
pdf
f(x) =
0.25e−0.25(x −
1) when x ≥ 1as a model for the
distribution of X = time (sec) spent at the
median line. (Round your answers to three decimal places.)
(a) What is the probability that waiting time is at most 2 sec?
More than 2 sec?
at most
2 sec
P(X ≤ 2)
=
more
than 2 sec
P(X > 2)
=
(b) What is...
The Charming City Construction Company is considering six projects. The projects, the number of supervisors and...
The Charming City Construction Company is considering six
projects. The projects, the number of supervisors and the number of
workers required for each project, and the expected profits for
each project are given below.
Project
1 2 3 4 5 6
________________________________________________________________
Supervisors Required 5 4 6 3 4 2
Workers Required 15 24 35 22 26 32
Profit (in thousands of dollars) 210 290 330 240 300 200
The objective is to maximize the company's total expected profit
subject...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Enumerations Create an advanced enumeration to represent months (JANUARY – DECEMBER) called enuMonths Add internal properties...
- What is the minimum size of the automorphism group of a simple directed graph having more...
- The birthday paradox says that the probability (chance) that two people in a room will have...
- #include <iostream> #include "lib.hpp" using namespace std; int main() { // declare the bool bool...
- Why do we compare means instead of individual scores? for comparing average SAT test scores across...
- NPV Your division is considering two projects with the following cash flows (in millions): 0...
- The equivalent synchronous impedance of a 25kVA, 400V three-phase Y-connected synchronous generator is 0.05 + j1.6...
ADVERTISEMENT