AURAK Paper Plant AURAK Paper Factory, located near downtown RAK, has long been delaying the expense of installing air pollution control equipment in its facility. The Environmental Protection Agency (EPA) has recently given the manufacturer 16 weeks to install a complex air filter system. AURAK Paper has been warned that it may be forced to close the facility unless the device is installed in the allotted time. The Plant Manager, wants to make sure that installation of the filtering system progresses smoothly and on time. Given the following information, develop a table showing activity precedence relationships. AURAK Paper has identified the eight activities that need to be performed in order for the project to be completed. When the project begins, two activities can be simultaneously started: building the internal components for the device (activity A) and the modifications necessary for the floor and roof (activity B). The construction of the collection stack (activity C) can begin when the internal components are completed. Pouring the concrete floor and installation of the frame (activity D) can be started as soon as the internal components are completed and the roof and floor have been modified. After the collection stack had been constructed, two activities can begin: building the high-temperature burner (activity E) and installing the pollution control system (activity F). The air pollution device can be installed (activity G) after the concrete floor has been built. Finally, after the control system and pollution device have been installed, the system can be inspected and tested (activity H). Activities and precedence relationships may seem rather confusing when they are presented in this descriptive form. It is therefore convenient to list all the activity information in a table first. You are required to: 1. Draw AON network diagram for AURAK Paper Plant 2. What is the critical path method of this diagram? 3. What is the impact on the sequence of activities if EPA approval is required after Inspect and Test?
In: Operations Management
The average rent in a city is $1500 per month with a standard deviation of $250. Assume rent follows the normal distribution. Use the empirical rule to answer the following questions.
a. what percentage of rents are between 1250 and 1750?
b. what percentage of rents are less than 1250?
c. what percentage of rents are greater than 2000?
In: Statistics and Probability
Which of the following statements is true about the types of insurance sold in the United States?
A. Most policies sold are whole life, but universal has the largest percentage of coverage in force.
B. Most sold are term life, but whole life has the largest percentage of face amount in force.
C. Most policies sold are whole life, but term life has the largest percentage of face amount coverage in force.
D. Most policies sold are term life, but variable life has the largest percentage of face amount coverage in force.
In: Operations Management
If rRF = 5%, rM = 11%, and b = 1.3 for Stock X,
a. what is rX, the required rate of return for Stock X?
b. What would rX be if investors expected the inflation rate to
increase by 2 percentage points?
c. What would rX be if an increase in investors’ risk aversion
caused the market risk premium to increase by 3 percentage points?
rRF remains at 5 percent.
d. What would kX be if investors expected the inflation rate to
increase by 2 percentage points and their risk aversion increased
by 3 percentage points?
In: Finance
The Graduate Management Admission Test (GMAT) is a standardized exam used by many universities as part of the assessment for admission to graduate study in business. The average GMAT score is 547 (Magoosh website, January 5, 2015). Assume that GMAT scores are bell-shaped with a standard deviation of 100 .
a. What percentage of GMAT scores are 647 or higher?
b. What percentage of GMAT scores are 747 or higher (to 1 decimal)?
c. What percentage of GMAT scores are between 447 and 547?
d. What percentage of GMAT scores are between 347 and 647 (to 1 decimal)?
In: Statistics and Probability
You are the operations manager for an airline and you are considering a higher fare level for passengers in aisle seats. How many randomly selected air passengers must you survey? Assume that you want to be 90% confident that the sample percentage is within 1.5 percentage points of the true population percentage. Complete parts (a) and (b) below.
a. Assume that nothing is known about the percentage of passengers who prefer aisle seats.
n= 3007
b. Assume that a prior survey suggests that about 38% of air passengers prefer an aisle seat.
n= ?
In: Statistics and Probability
a.[6] Why is the current structure of benefits and funding for U.S. Social Security expected to be unsustainable without a change in the Social Security law? Give as complete a set of reasons as you can.
b.[6] Suppose that the only change in the law is a single fixed percentage change in the benefits paid. Every recipient would receive a fixed percentage of the benefit they would receive under current law. Estimate that percentage under the assumption that it will be as close to 100% as possible. Explain how you get your estimate, explaining the main factors that the percentage depends on.
In: Economics
A genetic experiment with peas resulted in one sample of offspring that consisted of
426 green peas and 168 yellow peas.a. Construct a
95% confidence interval to estimate of the percentage of yellow peas.
b. It was expected that 25% of the offspring peas would be yellow. Given that the percentage of offspring yellow peas is not 25%, do the results contradict expectations?
a. Construct a 95% confidence interval. Express the percentages in decimal form.
nothingless than<p less than<nothing
(Round to three decimal places as needed.)
b. Given that the percentage of offspring yellow peas is not 25%, do the results contradict expectations?
Yes, the confidence interval does not include 0.25, so the true percentage could not equal 25%
No, the confidence interval includes 0.25, so the true percentage could easily equal 25%
In: Statistics and Probability
A genetic experiment with peas resulted in one sample of offspring that consisted of 430 green peas and 153 yellow peas. a. Construct a 95% confidence interval to estimate of the percentage of yellow peas. b. It was expected that 25% of the offspring peas would be yellow. Given that the percentage of offspring yellow peas is not 25%, do the results contradict expectations?
a. Construct a 95% confidence interval. Express the percentages in decimal form. nothingless thanpless than nothing (Round to three decimal places as needed.)
b. Given that the percentage of offspring yellow peas is not 25%, do the results contradict expectations? No, the confidence interval includes 0.25, so the true percentage could easily equal 25% Yes, the confidence interval does not include 0.25, so the true percentage could not equal 25%
In: Statistics and Probability
A genetic experiment with peas resulted in one sample of offspring that consisted of
426426
green peas and
152152
yellow peas.
a. Construct a
9090%
confidence interval to estimate of the percentage of yellow peas.
b. It was expected that 25% of the offspring peas would be yellow. Given that the percentage of offspring yellow peas is not 25%, do the results contradict expectations?
a. Construct a
9090%
confidence interval. Express the percentages in decimal form.
nothingless than<pless than<
nothing
(Round to three decimal places as needed.)
b. Given that the percentage of offspring yellow peas is not 25%, do the results contradict expectations?
No, the confidence interval includes 0.25, so the true percentage could easily equal 25%
Yes, the confidence interval does not
include 0.25, so the true percentage could not
equal 25%
In: Statistics and Probability