The average number of mosquitoes in a stagnant pond is 80 per square meter with a standard deviation of 8. If 16 square meters are chosen at random for a mosquito count, find the probability that the average of those counts is more than 81.6 mosquitoes per square meter. Assume that the variable is normally distributed.
For each of the following, indicate whether or not you would expect it to have a strong seasonal component and why. a. Sales of colorful wrapping paper, recorded monthly b. The number of air travelers to Hawaii from Chicago, recorded monthly c. The S&P 500 stock market index, recorded daily. Assume that the stock market is ef
Please answer the problem below and show the work-steps to how the answers were derived. ________________________________________________________________________ Markland Manufacturing intends to increase capacity by overcoming a bottleneck operation by adding new equipment. Two vendors have presented proposals. The fixed
A drug manufacturer wants to estimate the effect of its new drug designed to increase patients white blood cell count. How many sample runs of the drug must be performed to ensure that the estimate is accurate to within 50 cells (per microliter of blood) at 95% confidence? Assume the population standard deviation to be 110 cells
19. A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spent studying per week. Assuming a standard deviation of 6 hours, what is the required sample size if the error is to be less than ½ hour with a 95% level of confidence? 20. A survey of
Please provide an answer to the problem below and make sure to show all the work as to how the answer was derived. ------------------------------------------------------------------------ Barbara Flynn is in charge of maintaining hospital supplies at General Hospital. During the past year, the mean lead time demand for b
I am having trouble with a question for queuing: A single-server queuing system with an infinite calling population and a first-come, first-served queue discipline has the following arrival and service rates: µ= 24 customers per hour λ; = 16 customers per hour Determine: L Lq W Wq P0 P3 U Please show i
Small-cap mutual funds gained an average of 8.4% in the first half of 2000. Assume that the distribution of returns in the first half of 2000 for mutual funds specializing in small companies is distributed as a normal random variable with a mean of 8.4% and a standard deviation of 10%. The return for 90% of small company mutua
Given the below activities which activities are on the critical path? What is the length of the critical path? Activity Immediate Predecessors Time (days) A - 3 B A 4 C
Minimize the following: Z=2A + 4B 4A+6B>=120 2A+6B>=72 B>=10
Always get overwhelmed by the amount of material when covered at a comprehensive level. Attached is the study material of what to be prepared to cover at the conclusion of this course. I have worked through them but get stumped at several points. Can you provide a systematic approach to these problems and provide a reference to
A large distributor of oil-well drilling equipment operated over the past 2 years with EOQ policies bases on an annual holding cost rate of 22%. under the EOQ policy, a particular product has been ordered with a Q*=80. A recent eval of holding costs shows that because of an increase in the interest rate associated with bank loan
1. A regulatory agency claims the mean weekly telemarketing calls a citizen receives is 18 or less. A consumer advocacy group surveyed 81 citizens and found that the mean number of calls they received weekly was 19. At a level of significance of alpha = 0.05 is there sufficient evidence to reject the agencies claim? Assume
Linda Lechner is in charge of maintaining hospital supplies at General Hospital. During the past year the mean lead time demand for bandage BX-5 was 60. Furthermore, the standard deviation for BX-5 was 7. Linda would like to maintain a 90% service level. What safety stock level given the statistics? A. 1 B. 9 C. 150 D. 13
Please provide a step by step resolution to this problem. Which person is relatively taller in their group, a man 75 inches tall (xbar = 70 and s = 4.0) or a woman 70 inches tall (xbar = 65 and s = 3.5)? (Note: xbar represents the mean value of the sample of heights collected.)
The credit score of a 35 year old applying for a mortgage at Ulysses Mortgage Associates is normally distributed with a mean of 600 and a standard deviation of 100. (a) Find the credit score that defines the upper 5 percent. (b) Seventy-five percent of the customers will have a credit score higher than what value? (c) With
A firm is considering three capacity alternatives: A,B & C. Alternative A would have an annual fixed cost of $150,000 and variable costs of $28 per unit. Alternative B would have annual fixed costs of $145,000 and variable costs of $19 per unit. Alternative C would have fixed costs of $100,000 and variable costs of $15 per unit.
Please see attachment ... I need help with data sets. Please use the dataset and determine the following values to two decimal places: Mean Median Mode Standard Deviation Range DATA: 94 75 85 78 74 63 89 62 68 100 92 70 83 73 77 95 88 92 80 64 92 62 97 65 80 100 85 79 68 74
See the attachment for a resource in answering the following questions 5. Referring to the attachment, How many activities are included in the monthly budget for month four? (note: the ES, LS, and t are presented in months) A. 1 B. 2 C. 3 D. impossible to tell 6. What is the monthly budget for mon
For each of the following changes, calculate the new optimal profit (do not make any additional Solver runs). 4. A plant can manufacture four different products: A, B, C, and D in any combination. Each product requires time on each of four machines in minutes per pound of product, as shown in the following table. Each machine
Suppose we have a constraint for a resource that is binding in optimum. Find a scenario under which the optimal profit will remain unchanged even if we have more of that resource. Draw a graph that represents scenario!
Explain each term: (a) explained variation; (b) unexplained variation; (c) factor; (d) treatment.
The University Computing Center is open 24 hours per day. Staffing requirements vary by four-hour time periods and by day. The requirements for a two-day cycle are given in the table provided in file (These requirements repeat every two days). Staff can work either a four-hour shift or an eight-hour shift. The "eight-hour people
An individual investor has just obtained a $100,000 (after-tax) bonus from her employer and is looking for investment opportunities for these funds. The investor is about five years from retirement and would like to choose investments that are somewhat safe, yet offer a worthwhile return. A close friend of hers who is an inves
Bryson Foods produces two types of turkey cutlets for sale to fast food restaurants. Each type of cutlet consists of white meat and dark meat. Cutlet 1 sells for $7 per pound and must consist of at least 70% white meat. Cutlet 2 sells for $5 per pound and must contain at least as much white meat as dark meat. Based on past deman
Which factors are important in successfully turning optimal decisions obtained from models into real actions? Provide two factors. Explain your answers.
The distribution of scores on a standardized aptitude test is approximately normal with a mean of 520 and a standard deviation of 100. What is the minimum score needed to be in the top 20% on this test? Carry your intermediate computations to at least four decimal places, and round your answer to the nearest integer.
The Fix-It Shop has added a fourth repairman, Davis. Solve the accompanying cost table for the new optimal assignment of workers to projects. PROJECT Worker 1 2 3 Adams $11 $14 $6 Brown 8 10
Don Levine Corporation is considering adding an additional plant to its three existing facilities in Decatur, Minneapolis, and Carbondale. Both St. Louis and East St.Louis are being considered. From Existing Plants O Decatus Minneapolis Carbondale Demand Blue Earh
The management of the Executive Furniture Corporation decided to expand the production capacity at its Des Moines factory and to cut back production at its factories. It also recognizes a shifting market for its desks and revises the requirements at its three warehouses. Data for Problem: New Warehouse Requirements