Start A B activity Time C D E F G H A B C D E F G H 5 3 7 6 73 10 8 End
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For the following data, see image
a. identify the critical path?
b. how long will it take to complete this project?
c. can activity D be delayed without delaying the entire project? if so, by how many weeks?
d. Can activity C be delayed without delaying the entire project? If so, by how many weeks?
how many weeks?
e. What is the schedule for activity E?
Topic: stochastic processes
Step by step
Solved in 3 steps with 2 images
- 150 30 0 www ii) 14 i) 21 ii) 28 days 35 42 (a) The Figure above shows simulated data on the number of people (in thousands) who use public transport every day in Melbourne. i) 49 56 Does this time series exhibit a time trend? If there is a time trend, explain what could explain this trend. (b) Consider the following estimated model of industrial production (Y), which uses quarterly data from 2001q1 to 2022q4 and includes a constant, a time trend (t) and 3 seasonal dummy variables (Q1, Q2, and Q3) in the equation. Does this time series exhibit seasonality? What statistical test could you perform to test whether there is seasonality? If there is seasonality, explain what could explain this seasonal pattern. log(Y) = 6.01 +0.05t -0.0201 -0.03Q2 -0.0103 Interpret the estimated coefficients for the time trend and three seasonal dummies. Based on the estimated equation above, what would be the forecast for industrial production for the first quarter of 2024?A cohort study is conducted to assess the association between clinical characteristic and the risk of stroke. The study involves n-1,250 participants who are free of stroke at the study start. Each participant is assessed at study start (baseline) and every year thereafter for five years. The following table displays data on hypertension status measured at baseline and hypertension status measured two years later. 1. s 2 Years: Not Hvpertensive 850 45 2 Years: Hypertensive 148 207 Baseline: Not Hvpertensive Baseline: Hypertensive Compute the prevalence of hypertension at baseline Prevalence - Compute the prevalence of hvpertension at 2 vears. Prevalence - Compute the cumulative incidence of hypertension over 2 years. IncidenceQuarterly boat sales over a two-year period are provided in the table below. Suppose wo expect year 3 to have an annual demand of 50. Using the multiplicative seasonal model, what is the forecasted value for quarter 2 in year 3? (Enter your answer rounded to the nearest whole number.) Boat Sales Period Year 1 Year 2 Quarter 1 8 Quarter 2 10 11 Quarter 3 12 14 10 Quarter 4
- section 5.4 Drug usage in the workplace costs employers incredible amounts of money each year. Drug testing potential employees have become so prevalent that drug users are finding it extremely hard to find jobs. Drug tests, however, are not completely reliable. To decrease the likelihood of making an error, all potential employees are screened through two tests, which are independent. One test has a 96% accuracy and the other has a 97% accuracy. Step 1 of 2 : If a person were drug free, what is the probability they would fail both tests? Round your answer to four decimal places, if necessary.6-58. A pump for a reservoir must be operated continuously (8,760 hours per year). In the event of a large storm, the electricity from the local utilitv's power grid may be interrupted for an indefinite period of time. To deal with this emergency situation, two mutually exclusive backup diesel generators are being investigated. One of them will be chosen for implementation. Relevant data are provided as follows: Generator A Generator B Initial investment $100,000 Annual operating $130,000 8,000 088 20AM and maint. 9,500 Useful life, years o 15 If salvage values of both generators are negligible and the study period is 60 years, which generator should be chosen? The MARR is 10% per year. (6.5) Togen4.
- adapted from Safe and Healthy Travel to a Mass GatheringCenters for Disease Control and Prevention International events draw huge crowds and come with unique risks to travelers. Whether they are planned years in advance, such as the Olympics, or happen more spontaneously, such as a president's memorial service, mass gatherings present several problems. They are associated with crowding at venues, poor hygiene from temporary food and sanitation facilities, and challenging security situations. The risk of infectious diseases increases because of crowded conditions and the influx of attendees from around the world. A mass gathering can be thought of as any gathering of people that is large enough to strain local resources. Typically, they involve a large number of people—sometimes numbering in the millions—at a specific location, for a specific purpose, and for a defined time frame. 16 Select the correct location on the image. Which flash card correctly explains…2. Iconic memory is a type of memory that holds visual information for about half a second (0.5 second). To demonstrate this type of memory, participants were shown three rows of four letters for 50 milliseconds. They were then asked to recall as many letters as possible, with a 0-, 0.5-, or 1.0-second delay before responding. Researchers hypothesized that longer delays would result in poorer recall. The number of letters correctly recalled is given in the table for this between-subjects designs. G=114 ΣΧ2 = 878 N=18 0 12 11 6 10 8 7 T = 54 M=9 SS=28 Delay Before Recall (in seconds) 0.5 8 4 10 6 3 5 T = 36 M = 6 SS = 34 1.0 4 b. Compute eta-squared to measure the effect size. WOH 4 2 5 7 2 T=24 M=4 SS = 18 a. Do the data indicate that delay to recall had a significant impact on number of words recalled? Use the hypothesis testing steps & alpha = .05. Compute any necessary post-hoc tests.Again recall Table 8a from the working paper "The Market for Financial Advisor Misconduct" discussed in Lecture 7 and HW 7. For your convenience, the table is reproduced below. Table 8a. Consequences of Misconduct: Industry and Firm Discipline No Misconduct Misconduct Remain with the Firm 81.29% 51.99% Leave the Firm 18.71% 48.01% Leave the Industry 8.92% 26.96% Join a Different Firm (within 1 year) 21.05% 9.79% Note: Table 8a displays the average annual job turnover among financial advisers over the period 2005-2015. The table shows, on average, the percentage of advisers that remain with their firm, leave the industry (for at least one year) or join a new firm (within a year). The job transitions are broken down by whether or not the advisor was disciplined for misconduct in the previous year. Consider randomly selecting five financial advisors who were disciplined for misconduct in the previous year. What is the chance that at least one of them leaves the firm? (Answer as a…
- 1 (part 1). Does When Food Is Eaten Affect Weight Gain?A study was introduced that examined the effect of light at night on weight gain in mice. In the full study of 27 mice over a four-week period, the mice who had a light on at night gained significantly more weight than the mice with darkness at night, despite eating the same number of calories and exercising the same amount. Researchers noticed that the mice with light at night ate a greater percentage of their calories during the day (when mice are supposed to be sleeping). The computer output shown below allows us to examine the relationship between percent of calories eaten during the day, DayPct, and body mass gain in grams, BMGain. A scatterplot with regression line is also shown below (attached image).Pearson correlation of BMGain and DayPct =0.740P-Value =0.000--------------------------------------------------------------The regression equation isBMGain=1.11+0.127DayPct Predictor Coef SE Coef T P Constant 1.113 1.382…Question: Solve the following problem using M/M/1 queueing model analytically: Consider a service facility with a single server and assume M/M/1 queueing model, for ? values of [0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9] and ? value of 4. Find the below steady state parameters: ??: Steady-state probability of having ? customers in system, assume ? = [0,1,2,3,4,5,6,7,8,9]. ?: Long-run time-average number of customers in system. ??: Long-run time-average number of customers in queue. ?: Long-run average time spent in system per customer. ??: Long-run average time spent in queue per customer.Question 4 Multi-Server QueueA supermarket manager is trying to decide how many cashers to employ for the peak time. The service times for check outs are exponentially distributed with a mean service time of 3 minutes. Customer arrivals to cashiers follow a Poisson arrival process with an average 110 customers per hour.a. What is the minimum number of cashers that would be needed to have the utilization less than one?b. If the waiting time is too long, customers might leave the store or even do not enter the store. It is estimated that for every minute of waiting time, the supermarket loses a potential profit of 50 HKD every hour from lost sales. The hourly wage for a casher is 80 HKD / hour. How many cashers should the supermarket employ to maximize its profit? (Keep four decimal places.