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Dolly Trolleys manufacture trolleys for a chain of supermarkets. Demand for trolleys is buoyant, so all production can be sold. Two models are produced by Dolly - the STREAMLINE (L) and the STANDARD (D). The streamline has three wheels and the standard has four. The daily availability of wheels (which are bought in) is limited to 240. Dolly works a single 8-hour shift per day. There are two stages of manufacture for trolleys: fabrication and spraying. Spraying takes 24 minutes for each streamline trolley and 10 minutes for each standard. Fabrication takes 30 minutes for each streamline trolley and 20 minutes for each standard. Three identical machines are available for fabrication, which can be used for either type of trolley (or both). Spraying is carried out manually by one person per trolley, and there are two staff available for this process. The profit from selling a streamline trolley is $20 and a standard trolley is $18. No more than 15 trolleys can be produced per hour because of storage limitations on work in progress. Develop a linear programming model for this problem. Use a graphical technique to determine the optimal solution for the Dolly Trolleys manufacturing company, including exact values for the variables (solving simultaneous equations where necessary).
A random sample of 95 printers discovered that 20 of them were being used in small businesses. Find the 95% limit for the population proportion of printers that are used in small businesses.
If we have a random sample of 6 patients who press call buttons. What is the probability that under 4 of them will have to wait five minutes to more for staff to respond?
Calculate the mean and standard deviation and determine the number of standard deviations the most extreme cost is away from the mean
Suppose you just received a shipment of eight televisions. Two of the televisions are defective. If two televisions are randomly selected, compute the probability that both televisions work. What is the probability at least one does not work?
You now conduct a series of experiments with electro-migration at the same 2 temperatures (T1 = 25ο C and T2= 60ο C). The current density at T1 was 2 mA/μm2 and the current density at T2 was 1 mA/μm2.
on friday wall street traders were anxiously awaiting the federal governments release of numbers on the january
a tourist bureau conducted a study which showed that 65 of the people who seek information about the state actually
Determine and plot the probability mass function and probability distribution function of the contract award amount (in millions of dollars).
In a random sample of 120 cheerleaders, 54 had suffered moderate to severe damage to their voices. With 90% confidence, what can we say about the maximum error if we use the sample proportion 54/120 = 0.45 as an estimate of the true proportion of ..
Your goal is to form a 95% confidence interval for the proportion of times green occurs with a margin of error no bigger than 0.005. How many spins do you plan to observe? Write a brief summary explaining your calculations.
1) What is the variable expense ratio? 2) What is break-even point in unit sales? 3) What is the contribution margin ratio? 4) What is the break-even point in dollars?
we know many types of data fall into a normal distribution with most of the observations falling toward the middle.
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