Question

In: Statistics and Probability

An engineer analyzes a production process with the goal of reducing both production mean time and...

An engineer analyzes a production process with the goal of reducing both production mean time and variability and develops and implements a solution. 30 observations are collected before the solution is implemented (with X ̅= 45.3 minutes and S=5.2 minutes), and then an additional 40 observations collected after implementation (with X ̅= 41.3 minutes and S=3.2 minutes). Historically, σ=5.4 minutes for the process. Does it appear that the engineer has in fact reduced the average production time? Or is the lower sample mean just a matter of chance? Assume the variance is unknown and unequal. Include supporting calculations and explanation to support your conclusion. Does it appear that the engineer has in fact reduced the variability of the process? Include supporting calculations and explanation to support your conclusion

Solutions

Expert Solution

Answer:-

Given that:-


Related Solutions

An engineer in charge of a production process that produces a stain for outdoor decks has...
An engineer in charge of a production process that produces a stain for outdoor decks has designed a study to test the research hypotheses that an additive to the stain will produce an increase in the ability of the stain to resist water absorption. The mean absorption rate of the stain without the additive is µ = 40 units. The engineer places the stain with the additive on n = 50 pieces of decking material and records? = 36.4 and...
While working for a client, an engineer learns confidential knowledge of a proprietary production process being...
While working for a client, an engineer learns confidential knowledge of a proprietary production process being used by the client’s chemical plant. The process is clearly destructive to the environment, but the client will not listen to the objections of the engineer to release information that was gained in confidence. Is it ethical for the engineer to expose the client? Why?
Management accounting measures, analyzes, and reports financial and nonfinancial information to internal managers. The goal is...
Management accounting measures, analyzes, and reports financial and nonfinancial information to internal managers. The goal is to use past performance to predict the future. The internal reports should plainly inform managers of the financial results of actual operations. The reports should also show how activities can be changed to affect and improve what will happen in the future. Business operations are complex sets of activities, and to maximize profit considerable information, analysis, and decision making is required in advance of...
A production process has a cycle time, time to produce a part, that is normally distributed...
A production process has a cycle time, time to produce a part, that is normally distributed with a mean of 12.6 minutes and a standard deviation of 2.4 minutes. Let X represent the cycle time for a part being produced. P( X > 17.4) = ______ Answer accurately to 4 decimal places. P( 11.4 < X < 16.2)= _______ Answer accurately to 4 decimal places. 97.5 percent of all parts are produced in less than _______ minutes. Enter your answer...
Analyzes the role of communication and communications strategies in both creating and resolving an issue in...
Analyzes the role of communication and communications strategies in both creating and resolving an issue in health care, with consideration of how theory or best practices could be applied for improved outcome
Reducing the water footprint is a universal goal to be accomplished, how this can be done...
Reducing the water footprint is a universal goal to be accomplished, how this can be done in Oman?
The steam used during the production of alumina in the Bayer process serves as both a...
The steam used during the production of alumina in the Bayer process serves as both a heating and process fluid. Some steam is recycled, but some is condensed, clarified, and used for hot water in the plant before being cooled in a forced draft cooling tower and discharged.Most of worldwide bauxite mining and alumina production takes place in Jamaica. Therefore, the source of process water for most plants is the Caribbean Sea. Seawater is desalinized and sent as “slightly saline”...
Develop a concept map that illustrates and analyzes patient advocacy and assistance for both the consumer...
Develop a concept map that illustrates and analyzes patient advocacy and assistance for both the consumer and provider. The concept map should include: The importance and drivers for patient advocacy for consumers. The importance and drivers for patient advocacy for healthcare organizations/providers. The benefits of patient advocacy and assistance for each stakeholder. The challenges and potential obstacles for each stakeholder. Use shapes and arrows to group ideas and link concepts.
The firm's production function as reported by the firm's production engineer is as follows: # of...
The firm's production function as reported by the firm's production engineer is as follows: # of Labor Units may be employed per week # of chairs may be produced 0 0 1 5 2 15 3 25 4 35 5 39 6 42 7 44 8 45 Moreover, the accounting department reports that the wage rate is $10, the unit cost of raw material is $1, the firm needs one (1) unit of raw material for each chair and the...
Regarding the “optimal length of time” for the production process to go for ….. What can...
Regarding the “optimal length of time” for the production process to go for ….. What can you tell me about the optimal length of time associated with: (1) the case when you take into account for time WITH time preferences BUT without risk and uncertainty considerations, and (2) the case when you take into account for time WITH time preferences AND with risk and uncertainty considerations. Which optimal length of time FOR (1) OR (2) is longer/shorter? Briefly EXPLAIN WHY...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT