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 inter- national 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 H0:μ≥10 versus H1:μ<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.

Q: You are a research assistant at a zoo. The question of your study is "Has the proportion of baby…

A: You are a research assistant at a zoo.  The question of your study is "Has the proportion of…

Q: 3. The marks obtained by the students in a class as given below. Find the Range and its coefficient.…

A:

Q: Consider a set of data in which the sample mean is 45.4 and the sample standard deviation is 7.2.…

A: Solution

Q: A certain chemical pollutant in the Pasig River has been constant for several years with mean u = 34…

A:

Q: For item d, use the decision below as your reference. The null hypothesis was not rejected, and it…

A: The following information has been given: Null Hypothesis : there is no impact of organic food on…

Q: The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on…

A:

Q: Trends in fashion have signaled the emergence of green as the color of the century. It ranked third…

A: Solution-: Let, X= Number of local designers preferred the color green among 250 designers Given:…

Q: Suppose that the heights of adult women in the United States are normally distributed with a mean of…

A:

Q: From 3 different restaurants (each of which serves breakfast, lunch, and dinner), a random sample of…

A: For the given data Perform chi square test

Q: Gini coefficient is a statistic used to measure income inequality within nations. It ranges from 0…

A: We need to conduct a significance test on Pearson’s r at an alpha of 0.05 to test population size…

Q: Suppose Z follows the standard normal distribution. Use the calculator provided, or this table, to…

A: The answer is attached below,

Q: ndom sample of 17 registered nurses in a large hospital showed that they worked on average 43.7…

A: It is given that We have a random sample of size, n = 17 sample mean, x̄ = 43.7 sample standard…

Q: Gini coefficient is a statistic used to measure income inequality within nations. It ranges from 0…

A: Gini coefficient is a statistic used to measure income inequality within nations. It ranges from 0…

Q: Find the standard deviation of the following -14, -4,-10, -12, 5, -1.

A:

Q: Individuals in a random sample of 120 were asked whether they supported capital punishment. The…

A: Sample size(n)=120 The objective is to determine whether the opinions of the individuals (as to Yes,…

Q: A WSS random process X(f) has psd Sx(@) XX a* +10@ +9 Find the autocorrelation and mean square value…

A:

Q: 3) An actress would like to try a diet program. She intends to adopt the diet only if the average…

A: Given that  3) An actress would like to try a diet program. She intends to adopt the diet only if…

Q: Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the…

A: From the provided information, Sample size (n) = 960 Sample proportion (p̂) = 0.60

Q: 2. The following data are selected randomly from the population of normally distributed values. 29…

A:

Q: Define index number and mention the uses of index numbers. What is the difference between wholesale…

A: Index number- Index number is a number designed to measure the average change in the values of…

Q: 3. A study was conducted to compare automobile gasoline mileage for three formulations of gasoline.…

A: Introduction: We need to perform two tests- one to check if the mean mileage per gallon differs for…

Q: Twelve students have volunteered to help clean up an oil spill. The project director needs 3 bird…

A: Twelve students have volunteered to help clean up a small oil spill. The project director needs 3…

Q: There are four entrances to the Government Center Building in downtown Philadelphia. The building…

A: For the given data Perform Chi square goodness of fit

Q: 3. The marks obtained by the students in a class as given below. Find the Range and its coefficient.…

A:

Q: Suppose that the lifetimes of tires of a certain brand are normally distributed with a mean of…

A: Given that mean =74500 , p value =0.01,x =55000 s.d =?

Q: Consider the function f(x) = e , – 2 < a < 2. (a) Estimate the area under the graph of f using four…

A:

Q: Suppose Z follows the standard normal distribution. Calculate the following probabilities using the…

A: For the given data Find all the required

Q: A restaurant buys avocados from three suppliers P, Q and R. Records show that 30% of the avocados…

A: Given that

Q: 1. In 120 throws of a single die, the following distribution of faces was obtained. faces 1 2 6…

A:

Q: out the effects of increasing the length of advertisements from 30 seconds to one minutes conducts a…

A: Given that - A market research firm interested in finding out the effects of increasing the length…

Q: The producer of a weight-loss pill advertises that people who use the pill lose, after one week, an…

A: Given that mean =1.85,s.d =1.02,n=55,x bar =1.88

Q: Use f = 0.05 in answering the following. Two-sample test for binomial proportion Test the…

A: Given information:-   Streptomycin Saline Died 67 157 Lived 194 104

Q: With reference to the following data, find the correlation coefficient and the regression equation…

A: From the provided information, x y 91 58 87 63 75 68 66 71 50 79…

Q: Find the P-value for the indicated hypothesis test with the given standardized test statistic.…

A:

Q: (c) Longevity: Honolulu USA Today reported that the state with the longest mean life span is Hawaii,…

A: For the given data Find all the required

Q: ther there has been a significant change in the distribution of class between the last school year…

A:

Q: b. If a contestants time is more than one standard deviation above the mean they are eliminated.…

A: Given that  Data values : 15 , 16 , 19, 20 , 21 , 22 , 25 , 25 , 26 , 28 , 32 , 40 Number of data…

Q: The spectral density of a WSS random process X(1) is given by Sxx (@) o* +130 +36 Find the…

A:

Q: Is there enough evidence at =α0.01 to support his claim? Assume that the variable is normally…

A: We have given that  Sample mean = 6.4 Population mean = 7 Population standard deviation = 1.6 Sample…

Q: A manufacturer of office machines is considering the production of a new word processor. The…

A: Use paired t - test distribution, if you have paired measures on the same subject. In our case, we…

Q: The textbook suggests an "entity-demeaned" procedure to avoid having to specify a potentially large…

A:

Q: 5.Determine the certainty factor of the conclusion using the following MYCIN rule? IF 1) The stain…

A: The certainty factor (CF), with the condition that IF "E" THEN "H" is given as: CFH, e=CFE, e×CFH, E…

Q: A certain collector is choosing between 4 different paintings to buy. To help him decide, he asked…

A:

Q: 3/21 Question 1 of 7, Step 5 of 5 Correct Consider the following frequency table representing the…

A:

Q: A brand of water-softener salt comes in bags marked “net weight 18kg”. The company that packages the…

A: Standard normal table has used to calculate probability.

Q: smaller bucket with capacity 1 (unit of volume) is used to fifill a larger bucket with capacity v…

A:

Q: 8. A quality control specialist for a five-star hotel restaurant takes a random sample of size 12 to…

A: We have to solve, Mentioned 3 subparts, Used formulas E= (upper limit - lower limit)/2 We have to…

Q: A certain collector is choosing between 4 different paintings to buy. To help him decide, he asked…

A: Null and Alternative Hypothesis: Ho: u1=u2=u3=u4 Ha: At least one painting is preferred more

Q: Find the mean of the following data set: 55, 35, 45, 67, 12, 24, 48, 55, 58, 30 *Enter up to two…

A:

Q: When it comes to casino games, the odds of winning at blackjack are better than the odds of winning…

A: The null hypothesis is, Ho: There is no association between the favorite game and passed in…