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The Entity Relationship Model Presentation

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The Entity-Relationship Model Conceptual Data Modeling Basic E-R Notation -2 The Entity-Relationship model • The E-R model is a detailed, logical representation of the data for an organisation or business area • It should be understandable to both the user and to the IT technologist • The model must be as ‘open’ as possible and not tied to any technology or to any particular business methodology • It must be flexible enough so that it can be used and understood in practically any environment where information is modelled The ER model • It is expressed in terms of entities in the business environment, the relationships (or associations) among those entities and the attributes (properties) of both the entities and their relationships • The E-R model is usually expressed as an E-R diagram E-R Model Constructs • Entity - person, place, object, event, concept • Entity Type - is a collection of entities that share common properties or characteristics. Each entity type is given a name, since this name represents a set of items, it is always singular. It is placed inside the box representing the entity type (Fig. 3-1) • Entity instance – is a single occurrence of an entity type. An entity type is described just once (using metadata) in a database, while many instances of that entity type may be represented by data stored in the database. e.g. – there is one EMPLOYEE entity type in most organisations, but there may be hundreds of instances of this en ...
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Tags: Conceptual Data Modeling The ER model Entity type system input IS model

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MIS 470 CSU Global Module 4 Housing Price Forecasting Project

In real estates, housing market prediction (forecasting) is crucial. There are many factors that may influence the house p ...

MIS 470 CSU Global Module 4 Housing Price Forecasting Project

In real estates, housing market prediction (forecasting) is crucial. There are many factors that may influence the house prices. The datasets housing.training.csv and housing.testing.csv contain 25 quantitative explanatory variables describing many aspects of residential homes in Ames, IA.The goal of this project is to predict house prices. To this end, we will be using regression analysis.In Week 4 Portfolio Milestone, you've examined housing.training.csv dataset. Now, examine housing.testing.csv dataset and perform the same tasks as given in Week 4 Portfolio Milestone. Using R, calculate the summary statistics (minimum, maximum, mean, median, and standard deviation) and create a histogram of sale price for each dataset. Comparing with housing.training,csv dataset, describe the similarities and/or differences.Combine the two datasets housing.training.csv and housing.testing.csv. This can be done in R by using the function combine(). Create a histogram of sale prices for the combined dataset and compare it with the histograms from training and testing datasets. Describe the similarities and differences.Using only the dataset housing.training.csv, fit a linear regression model using all the explanatory variables and SalePrice as the response variable.What are the significant factors? How do these variables relate to the sale price? Interpret your estimated model.Remove all the rows with missing values (NA) from the dataset housing.testing.csv. The function complete.cases() can be used. Using only the first 20 rows from housing.testing.csv, predict the sale price. The R function predict() can perform this task. You should have 20 predicted sale prices.Compare the predicted sale prices to the actual sale prices from the housing.testing.csv dataset (the first 20 rows). How good is your prediction?For each R output result, you may either type directly into a Word document or take a screenshot. If you take the screenshot, make sure that the current date is shown.Ensure everything is clearly labeled. The report must be 10-12 pages long, including a title page and reference page (the report itself should be 8-10 pages). Cite 2-3 academic sources other than the textbook, course materials, or other information provided as part of the course materials. Follow APA format, according to CSU Global Writing Center (Links to an external site.).

MADM 710 LSUS Module 6 Recruitment & Selection Process on Human Resources Discussion

Question 1 Tom owns a small trucking firm. Tom has always hired employees on the basis of three qualifications: 1. They m ...

MADM 710 LSUS Module 6 Recruitment & Selection Process on Human Resources Discussion

Question 1 Tom owns a small trucking firm. Tom has always hired employees on the basis of three qualifications: 1. They must have a high school diploma; 2. They must pass a short paper-and-pencil test which is given to all applicants; and 3. They must have a valid driver’s license if applying for the position of driver. The short test is interesting, as it was devised by Tom from sample questions found on a GED (General Education Degree) Equivalency Test. The test consists of 33 vocabulary and mathematical questions, each worth 3 points. Anyone scoring below 70 is automatically rejected. Last month Tom advertised in the local paper for two new drivers. Ten people applied for the openings, but Tom rejected four applicants because they were not high school graduates. Three others were rejected because of test scores below 70. The two white males hired scored the highest on the test, had high school degrees, and also had valid driver’s licenses. This week Tom was notified that two equal employment complaints had been filed against Tom and his firm. One complaint, a woman, alleges that the test does not measure a person’s ability to drive and is not a valid predictor of job success. The other complaint, a minority man, alleges that the high school diploma requirement is not related to the ability to do the job and unfairly discriminates against minorities. If you were an EEO investigator, how would you evaluate this selection procedure?Question 2 You are a HR manager at Company A. Mike, 42 years old, has been a generally competent and productive welder at Company A for ten years. Mike has been popular with his co-workers. Although he periodically “blows up” at them, he always apologizes afterwards. His absenteeism rate has been higher than average for the last several years, with most absenteeism on Mondays. Also, it is not uncommon for Mike to be 10-15 minutes late at least once a week. But, because of a shortage of experienced welders and because Mike often cuts his lunch hour short to make up his tardiness time, you and other managers at Company A have decided to live with Mike’s attendance problems as long as they don’t become extensive. One day, Mike's coworker James told you that Mike has been staying at the neighborhood bar for several hours after work most nights. James also said he had heard rumors that Mike was having personal problems at home. You don't like to pry into the lives of your workers, but you know that you can’t ignore the situation much longer, especially with the others beginning to talk about Mike’s problem. How would you handle this? What actions, if any, would you take?

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Management Communication

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Bethel University FedEx Company Recommendations Discussion

Organization Development is a planned change discipline concerned with applying behavioral science knowledge and practice ...

Bethel University FedEx Company Recommendations Discussion

Organization Development is a planned change discipline concerned with applying behavioral science knowledge and practice to help organizations achieve greater effectiveness. In this course, you will conduct an analysis of your organization with the goal of creating a plan to improve an aspect of your organization’s performance. Each unit will build on the previous complete to achieve the goal. In Unit 6, you identified your competitor and external environment. For your Unit 7 Complete assignment, you will outline the recommendations and implementation strategies to improve the organization’s effectiveness. Write a narrative essay (minimum 1500 words) in which you address and discuss the questions and statements listed below. Use at least three scholarly sources and remember to demonstrate a thorough understanding of the READ and Attend sections in your essay. Cite your sources in APA format. State the recommendation in the form of a hypothetical question. For example, if your top recommendation is to introduce a new merit-based incentive system in your company to enhance morale, you would simply say: 'Would the creation of a new merit-based incentive system enhance morale (or any other desired outcome) and improve organizational performance?' • How can you prove your recommendation is likely to yield the outcome you suggested? What data when collected would support your assertions? How do you intend to collect such data? Where can you find or generate the data identified in the previous question? • Are there any other considerations that you have not previously mentioned

Need business and finance help with a short discussion about the course of Principles of management

Hello,This is going to be a short discussion on the course of Principles of management. I expect great quality work. I do ...

Need business and finance help with a short discussion about the course of Principles of management

Hello,This is going to be a short discussion on the course of Principles of management. I expect great quality work. I do NOT need big words, so try to avoid those complex words when writing this short discussion. In addition, If the work is copy written, I will withdraw the money and report you to Studypool. Remember to respond to two students (it can be vague and made up). If you have any further questions feel free to message me.Thanks!Question:First, by way of introduction, share your major concentration and how this course and program fit into your career goals. Next, read SAS: A New No. 1 Best Employer. As you read through this article, consider the introduction to the P-O-L-C framework that you received in this module. In your initial post, respond to the following question: How would you describe SAS’s employee management using the P-O-L-C framework? In addition, provide an example from SAS of each facet of the P-O-L-C framework: planning, organizing, leading, and controlling, and briefly explain how the example aligns with that facet. In responding to your peers, evaluate how their examples can impact employee management. Support your response with sound arguments and properly cited sources, when applicable.

ECE313 Ashford University Acculturation in Classroom journal Entry

Today’s classrooms are filled with diverse children and families. As educators, we strive to provide the best learning ...

ECE313 Ashford University Acculturation in Classroom journal Entry

Today’s classrooms are filled with diverse children and families. As educators, we strive to provide the best learning environments to support all children and their families. For this journal entry you will reflect on your beliefs as an educator in a diverse society. What thoughts do you have about teaching in diverse classrooms? How have views of immigration affected education? What ideas do you have about acculturation in the classroom? Carefully review the Grading RubricLinks to an external site. for the criteria that will be used to evaluate your journal entries.

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MIS 470 CSU Global Module 4 Housing Price Forecasting Project

In real estates, housing market prediction (forecasting) is crucial. There are many factors that may influence the house p ...

MIS 470 CSU Global Module 4 Housing Price Forecasting Project

In real estates, housing market prediction (forecasting) is crucial. There are many factors that may influence the house prices. The datasets housing.training.csv and housing.testing.csv contain 25 quantitative explanatory variables describing many aspects of residential homes in Ames, IA.The goal of this project is to predict house prices. To this end, we will be using regression analysis.In Week 4 Portfolio Milestone, you've examined housing.training.csv dataset. Now, examine housing.testing.csv dataset and perform the same tasks as given in Week 4 Portfolio Milestone. Using R, calculate the summary statistics (minimum, maximum, mean, median, and standard deviation) and create a histogram of sale price for each dataset. Comparing with housing.training,csv dataset, describe the similarities and/or differences.Combine the two datasets housing.training.csv and housing.testing.csv. This can be done in R by using the function combine(). Create a histogram of sale prices for the combined dataset and compare it with the histograms from training and testing datasets. Describe the similarities and differences.Using only the dataset housing.training.csv, fit a linear regression model using all the explanatory variables and SalePrice as the response variable.What are the significant factors? How do these variables relate to the sale price? Interpret your estimated model.Remove all the rows with missing values (NA) from the dataset housing.testing.csv. The function complete.cases() can be used. Using only the first 20 rows from housing.testing.csv, predict the sale price. The R function predict() can perform this task. You should have 20 predicted sale prices.Compare the predicted sale prices to the actual sale prices from the housing.testing.csv dataset (the first 20 rows). How good is your prediction?For each R output result, you may either type directly into a Word document or take a screenshot. If you take the screenshot, make sure that the current date is shown.Ensure everything is clearly labeled. The report must be 10-12 pages long, including a title page and reference page (the report itself should be 8-10 pages). Cite 2-3 academic sources other than the textbook, course materials, or other information provided as part of the course materials. Follow APA format, according to CSU Global Writing Center (Links to an external site.).

MADM 710 LSUS Module 6 Recruitment & Selection Process on Human Resources Discussion

Question 1 Tom owns a small trucking firm. Tom has always hired employees on the basis of three qualifications: 1. They m ...

MADM 710 LSUS Module 6 Recruitment & Selection Process on Human Resources Discussion

Question 1 Tom owns a small trucking firm. Tom has always hired employees on the basis of three qualifications: 1. They must have a high school diploma; 2. They must pass a short paper-and-pencil test which is given to all applicants; and 3. They must have a valid driver’s license if applying for the position of driver. The short test is interesting, as it was devised by Tom from sample questions found on a GED (General Education Degree) Equivalency Test. The test consists of 33 vocabulary and mathematical questions, each worth 3 points. Anyone scoring below 70 is automatically rejected. Last month Tom advertised in the local paper for two new drivers. Ten people applied for the openings, but Tom rejected four applicants because they were not high school graduates. Three others were rejected because of test scores below 70. The two white males hired scored the highest on the test, had high school degrees, and also had valid driver’s licenses. This week Tom was notified that two equal employment complaints had been filed against Tom and his firm. One complaint, a woman, alleges that the test does not measure a person’s ability to drive and is not a valid predictor of job success. The other complaint, a minority man, alleges that the high school diploma requirement is not related to the ability to do the job and unfairly discriminates against minorities. If you were an EEO investigator, how would you evaluate this selection procedure?Question 2 You are a HR manager at Company A. Mike, 42 years old, has been a generally competent and productive welder at Company A for ten years. Mike has been popular with his co-workers. Although he periodically “blows up” at them, he always apologizes afterwards. His absenteeism rate has been higher than average for the last several years, with most absenteeism on Mondays. Also, it is not uncommon for Mike to be 10-15 minutes late at least once a week. But, because of a shortage of experienced welders and because Mike often cuts his lunch hour short to make up his tardiness time, you and other managers at Company A have decided to live with Mike’s attendance problems as long as they don’t become extensive. One day, Mike's coworker James told you that Mike has been staying at the neighborhood bar for several hours after work most nights. James also said he had heard rumors that Mike was having personal problems at home. You don't like to pry into the lives of your workers, but you know that you can’t ignore the situation much longer, especially with the others beginning to talk about Mike’s problem. How would you handle this? What actions, if any, would you take?

10 pages

Management Communication

Good Morning and Happy Wednesday! I am happy, overjoyed, and proud to announce that our company has been exclusively contr ...

Management Communication

Good Morning and Happy Wednesday! I am happy, overjoyed, and proud to announce that our company has been exclusively contracted to distribute a new ...

Bethel University FedEx Company Recommendations Discussion

Organization Development is a planned change discipline concerned with applying behavioral science knowledge and practice ...

Bethel University FedEx Company Recommendations Discussion

Organization Development is a planned change discipline concerned with applying behavioral science knowledge and practice to help organizations achieve greater effectiveness. In this course, you will conduct an analysis of your organization with the goal of creating a plan to improve an aspect of your organization’s performance. Each unit will build on the previous complete to achieve the goal. In Unit 6, you identified your competitor and external environment. For your Unit 7 Complete assignment, you will outline the recommendations and implementation strategies to improve the organization’s effectiveness. Write a narrative essay (minimum 1500 words) in which you address and discuss the questions and statements listed below. Use at least three scholarly sources and remember to demonstrate a thorough understanding of the READ and Attend sections in your essay. Cite your sources in APA format. State the recommendation in the form of a hypothetical question. For example, if your top recommendation is to introduce a new merit-based incentive system in your company to enhance morale, you would simply say: 'Would the creation of a new merit-based incentive system enhance morale (or any other desired outcome) and improve organizational performance?' • How can you prove your recommendation is likely to yield the outcome you suggested? What data when collected would support your assertions? How do you intend to collect such data? Where can you find or generate the data identified in the previous question? • Are there any other considerations that you have not previously mentioned

Need business and finance help with a short discussion about the course of Principles of management

Hello,This is going to be a short discussion on the course of Principles of management. I expect great quality work. I do ...

Need business and finance help with a short discussion about the course of Principles of management

Hello,This is going to be a short discussion on the course of Principles of management. I expect great quality work. I do NOT need big words, so try to avoid those complex words when writing this short discussion. In addition, If the work is copy written, I will withdraw the money and report you to Studypool. Remember to respond to two students (it can be vague and made up). If you have any further questions feel free to message me.Thanks!Question:First, by way of introduction, share your major concentration and how this course and program fit into your career goals. Next, read SAS: A New No. 1 Best Employer. As you read through this article, consider the introduction to the P-O-L-C framework that you received in this module. In your initial post, respond to the following question: How would you describe SAS’s employee management using the P-O-L-C framework? In addition, provide an example from SAS of each facet of the P-O-L-C framework: planning, organizing, leading, and controlling, and briefly explain how the example aligns with that facet. In responding to your peers, evaluate how their examples can impact employee management. Support your response with sound arguments and properly cited sources, when applicable.

ECE313 Ashford University Acculturation in Classroom journal Entry

Today’s classrooms are filled with diverse children and families. As educators, we strive to provide the best learning ...

ECE313 Ashford University Acculturation in Classroom journal Entry

Today’s classrooms are filled with diverse children and families. As educators, we strive to provide the best learning environments to support all children and their families. For this journal entry you will reflect on your beliefs as an educator in a diverse society. What thoughts do you have about teaching in diverse classrooms? How have views of immigration affected education? What ideas do you have about acculturation in the classroom? Carefully review the Grading RubricLinks to an external site. for the criteria that will be used to evaluate your journal entries.