The article "Predicting Profit Performance for Selecting

Chapter 6, Problem 9E

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The article “Predicting Profit Performance for Selecting Candidate International Construction Projects”  (S. Han, D. Kim, and H. Kim, Journal of Construction Engineering and Management Science, 2007:  425–436) presents an analysis of the profit of international construction projects. In a sample of 126  projects, the average profit margin (in percent) was 8.24 with a standard deviation of 16.33. A test is made of \(H_{0}: \mu\) ≥ 10 versus \(H_{1}: \mu\) < 10.

Find the P-value. Do you believe that it is plausible that the mean profit margin is at least 10%, or are you convinced that it is less than 10%? Explain your reasoning.

Equation transcription:

Text transcription:

H_{0}: \mu

H_{1}: \mu

.

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