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Which of the following are used to test for the statistical significance or explanatory power of an individual variable?

Which of the following are used to test the statistical significance and explanatory power of all the independent

1. Which of the following are used to test for the statistical significance or explanatory power of an individual variable?

A) t-statistic

B) p-value

C) t-statistic and p-value

D) R-squared

E) F-statistic

F) R-squared and F-statistic

2. Which of the following are used to test the statistical significance and explanatory power of all the independent variables together (i.e., the explanatory power of the model)?

A) t-statistic

B) p-value

C) t-stastistic and p-value

D) R-squared

E) F-statistic

F) R-squared and F-statistic

3.Which should be used to determine if an individual variable should be added to the regression model?

A) Economic, business or physical theory.

B) The t-statistic and p-value of the variable coefficient.

C) The correlation with other variables included in the model.

D) All of the above.

4.Suppose you have a regression model that depicts the relationship between costs in dollars (C) and the machine hours(H) such that log(C) = 10 + 2(logH). Which of the following is the correct interpretation of the machine hours coefficient?

A) A 1 hour increase in machine use will increase costs by $2.

B) A 1 increase in costs will occur if there is a 2 hour increase in machine use.

C) A 1% increase in machine hours will increase costs 2%.

D) A 1% increase in costs will result from a 2% increase in machine hours.

5.Which of the following is NOT likely to occur when multicollinearity exists in a model?

A) Inflated Adjusted R-squared

B) High correlation between a pair or pairs of variables.

C) A variance inflation factor (VIF) > 5.

D) Theoretically important variables having coefficients that are statistically insignificant.

For this question, none of the options is right. (All the options are true in a model with multicollinearity)

8.2.1: An analyst is evaluating the demand for building and construction materials relative to the cost of borrowing or the mortgage rate in Los Angeles and San Francisco. He believes that the following model is appropriate: Y = 10 + 5X1 + 8X2, where Y is demand in $100 per capita; X1 is mortgage rate in %, and X2 equals 1 if SF, 0 if LA.

6.Given the information in 8.2.1, each additional increase of 1% in the mortgage rate will lead to an estimated average _________________ in demand for building materials, holding constant the effect of city.

A) Increase of $500 per capita.

B) Decrease of $500 per capita.

C) Increase of $5 per capita.

D) Decrease of $5 per capita.

7.Using the model in 8.2.1, the interpretation of the coefficient for X2 is: Holding constant the effect of mortgage rates,

A) Demand for building materials is $800 more per capita in SF than in LA.

B) Demand for building materials is $800 more per capita in LA than SF.

C) Demand for building materials is $8 more per capita in LA than in SF.

D) Demand for building materials is $8 more per capita in SF than in LA.

8.2.2: Advanced Technology Corporation (ATC) manufactures a home computer system and has hired a market research team to analyze the potential demand for this product using historical data on sales of similar products in 66 regions of the country in conjunction with information from consumer surveys. The research firm estimated the following demand function: Q = -36,000 – 10P + 2Px + 300I + 24A – 0.01Asquared, where Q=annual demand in units, P=price of ATC computer ($), Px=price of ATC major competitor computer ($), I = average family disposable income ($100), and A = advertising by ATC ($100).

8.Using situation 8.2.2, the correct interpretation of the coefficient for Px (i.e., +2) is:

A) An increase of computer sales of one unit will occur if there is a $2 increase in the price of the competitor’s computer holding constant P, I, and A.

B) An increase of computer sales of one unit will occur if there is a $200 increase in the price of the competitor computer, holding constant P, I, and A.

C) A $1 increase in the price of the competitor’s computer will increase ATC computer sales by 2 units, holding constant P, I, and A.

D) A $1 increase in the price of the competitor’s computer will increase ATC computer sales by 200 units, holding constant P, I and A.

9.Suppose you review the information in situation 8.2.2 and plan to test the explanatory power of: 1. the overall model and 2. a one-tail test of the individual coefficients, both at the .05 level of significance, then what critical values would you use for your tests? The first answer refers to tests for the model; the second answer refers to the test for the individual variable coefficient.

A) F=2.37 and t=1.671

B) t=1.671 and F=2.37.

C) F=2.25 and t=1.671

D) t=2.00 and F=2.37.

For this question, none of the options is right. (The correct answer is F = 2.52 and t = 1.671)

10.Using situation 8.2.2, what would happen to computer sales if ATC increased the advertising budget by $1000 (check units of measurement before you start to answer)?

A) Sales would increase by approximately 240 units.

B) Sales would increase by approximately 241 units.

C) Sales would increase by approximately 24,000 units.

What is your statistical decision regarding the pair of hypotheses?

our employer is a medium size IT company that produces smartphones and tablets

Question 3 (10 marks)
Your employer is a medium size IT company that produces smartphones and tablets. Your sales director approaches you with concerns about possible declining sales in the face of stiff competition from other larger producers such as Apple and Samsung who launched new products at the beginning of the year. Recent sales figures for the last 26 weeks are shown in the file QA Assignment 2.xls.
You have been asked to provide statistical evidence concerning the claim that recent weekly sales have declined following the launch of your competitor’s new devices. Prior to the beginning of the year, it was accepted that your company had mean weekly sales of $135,000 with a known standard deviation of $ 24,000.
a) Specify the most appropriate choice of null and alternative hypotheses to test whether there has been a decline in mean weekly sales. [2 marks]

b) Provide the formula for the test statistic and compute its value. [2 marks]

c) What is the critical value of the test using a significance level of 2.5 per cent?

d) What is your statistical decision regarding the pair of hypotheses? [1 mark]

e) What is your conclusion (in non-statistical language) about mean weekly sales?[1 mark]

f) Repeat parts (c), (d) and (e) using a significance level of 1 per cent. [3 marks]

Question 4 (38 marks)
PART A
In this question, we will be using information about attendances at Australian Rules Football (AFL) matches held at the Melbourne Cricket Ground (MCG). The data is in the Excel file (QA2-1 Xls.)
[Data obtained from: Smyth, GK (2011). Australasian Data and Story Library (OzDASL). http://www.statsci.org/data.]
We are interested in analysing the relationship between MCG match attendance and the combined membership of the two clubs playing in that match.
Produce a scatter plot of MCG attendance (dependent variable) against combined club membership (independent variable) and comment on the apparent relationship between these variables. [3 marks]

Calculate the correlation coefficient between MCG attendance andcombined club membership and interpret the result.[2 marks]

Use Excel (or other software) to estimate the linear regression model:

Write out the estimated regression equation. [2 marks]

Interpret the both the estimated intercept and estimated slope. [2 marks]

Is combined club membership a statistically significant predictor of match attendance at the MCG? Use a significance level of 5%. [2 marks]

Comment on the goodness of fit of the estimated model. [2 marks]

Predict the attendance at a match between Adelaide (25,000 members) and Western Bulldogs (16,500 members).[2 marks]

How do you think the above model could be improved in order to get a better prediction of the attendance at an AFL match held at the MCG? [2 marks]

PART B
Measurements of the mean maximum annual temperature for Sydney over the period 1859-2012 are contained in the Excel file: QA Assignment 2.xls. [Data sourced from the Australian Bureau of Meteorology]
Produce a graph of the Sydney temperature time series. Describe the relationship between temperature and time. [3 marks]

Use Excel to produce a simple linear trend regression model of Sydney temperatures. Write out the estimated regression equation. [2 marks]

Interpret the estimated slope. [2 marks]

Is there a statistically significant trend in Sydney temperatures? Explain why or why not? [2 marks]

Comment on the model’s goodness of fit. [2 marks]

Use your estimated model to forecast the mean annual Sydney temperature for 2015. [2 marks]

Use your estimated model to forecast the mean annual Sydney temperature for 2030. [2 marks]

Which of the above two forecasts do you expect to be more reliable?
Explain why. [3 marks]

Does your analysis in this question prove that man-made envi

Would there be a better example for the principle?

Examine and analyze the principles of polymorphism, inheritance and encapsulation. Use the Library to get started on finding resources.

Individual Portion

Each team member should take a term and explain it. Examples should be offered for each principle. Explanations should be offered about the principle’s importance and how it relates to Java as opposed to other programming languages.

Each team member must submit their work to the Small Group Submitted File area for easy access.

Group Portion

The team should then discuss each of the principles and examples. Determine whether descriptions capture the principle in a detailed and accurate manner. Examples should be discussed relative to appropriateness. Would there be a better example for the principle?

The group deliverable must include the description and example for each principle (as chosen by the team) to the Small Group Submitted file area.

Please add your file.

For assistance with your assignment, please use your text, Web resources, and all course materials.

Unit Materials

Answer

Discuss how technologies or information systems have contributed to the problem and how you will propose technology be implemented into the solution.

Identifying the Challenge in Law Enforcement

In Week 1, you chose a topic area and problem or challenge within that area. Throughout this course, you have researched the dynamics of the problem. The final piece of your project is to develop a viable solution that considers resources, policy, stakeholders, organizational readiness, administrative structures and other internal and external factors, as applicable. Using the papers you have written throughout this course, consolidate your findings into a succinct project.

Write a ten (10) page paper that as a minimum, your project should include:

 

  1. Identify the topical area – Prison Overcrowding
  1. Define a problem or challenge within your topical area that you understand in some depth or have an interest in (examples include high crime rate, poor morale, high levels of violence or recidivism, high number of civilian complaints of harassment, inadequate equipment). Outline the context of the problem or challenge, including the history and any policy decisions that have contributed to the situation.
  1. Describe how internal or external stakeholders have influenced the situation in a positive or negative way. How will you consider stakeholders in your solution to the problem? How will you motivate individuals to buy into your solution?
  1. Discuss how technologies or information systems have contributed to the problem and how you will propose technology be implemented into the solution.
  1. Discuss what data you have collected or researched to indicate there is a problem. Include at least two sources of data and how each is relevant to the problem.
  1. Develop an effective and efficient solution(s) and a course of action (i.e., plan) that addresses the problem or challenge.
  1. Explain what methods of assessment you will employ to measure the effectiveness of your solutions.
  1. Develop a 10-15 slide PowerPoint Presentation that summarizes the seven items above.
  1. Use at least 8 quality references. Note: Wikipedia and other Websites do not qualify as academic resources.

Your assignment must follow these formatting requirements:

 

  • Be typed, double spaced, using Times New Roman font (size 12), with one-inch margins on all sides; citations and references must follow APA or school-specific format. Check with your professor for any additional instructions.
  • Include a cover page containing the title of the assignment, the student’s name, the professor’s name, the course title, and the date. The cover page and the reference page are not included in the required assignment page length.

The specific course learning outcomes associated with this assignment are:

 

  • Assess a policy or problem and develop solutions based on available resources, taking into account the political and global implications.
  • Use technology and information resources to research issues in criminal justice.
  • Write clearly and concisely about criminal justice using proper writing mechanics.

Who is impacted internally and externally?

Identifying the Challenge

For your senior project, choose one of the following major criminal justice areas: law enforcement, prisons/corrections, the courts, Homeland Security, private security, or emergency management. This component will serve as the area for which your senior project will be based.

 

Next, identify a challenge or area of improvement within your chosen area. (For example, one may choose corrections as the topic area and violence in prisons as the problem). Over the weeks of this course, you will progressively research, learn about, write and present on a solution to the challenge or area of improvement from both a tactical and administrative perspective. Receive approval from your professor on your chosen topic. Additional project expectations are described in week 8.

 

Write a two to three (2-3) page paper in which you address the following:

 

  1. Outline the context of the problem or challenge, including the history and any policy decisions that have contributed to the situation.
  1. Why is it important that the problem be addressed?
  1. Who is impacted internally and externally?
  1. Why do you feel the problem hasn’t already been solved?
  1. Use at least three (3) quality references. Note: Wikipedia and other Websites do not qualify as academic resources.

Your assignment must follow these formatting requirements:

 

  • Be typed, double spaced, using Times New Roman font (size 12), with one-inch margins on all sides; citations and references must follow APA or school-specific format.
  • Check with your professor for any additional instructions.
  • Include a cover page containing the title of the assignment, the students name, the professor’s name, the course title, and the date. The cover page and the reference page are

Discuss how internal or external stakeholders have influenced the situation in a positive or negative way?

RJ 499 Week 4 Assignment 2 – Internal And External Stakeholders [Overlapping Jurisdiction in Law Enforcement]

Considering your chosen topic answer the following questions related to stakeholders:

Write a three to four (3-4) page paper in which you address the following:

 

  1. Identify the Internal and External Stakeholders.
  1. Discuss how internal or external stakeholders have influenced the situation in a positive or negative way?
  1. How will you consider stakeholders in your solution to the problem?
  1. How will you motivate individuals to buy into your solution?
  1. Use at least three (3) quality references. Note: Wikipedia and other Websites do not qualify as academic resources.

Your assignment must follow these formatting requirements:

 

  • Be typed, double spaced, using Times New Roman font (size 12), with one-inch margins on all sides; citations and references must follow APA or school-specific format. Check with your professor for any additional instructions.
  • Include a cover page containing the title of the assignment, the student’s name, the professor’s name, the course title, and the date. The cover page and the reference page are not included in the required assignment page length.

The specific course learning outcomes associated with this assignment are:

 

  • Consider personnel and stakeholders and how they influence decision making.
  • Use technology and information resources to research issues in criminal justice.
  • Write clearly and concisely about criminal justice using proper writing m

What is the NPV of the project, based on the required rate of return of 12%?

Manufacturer located in Key West, Florida

Conch Republic Electronics is a mid sized electronics manufacturer located in Key West, Florida. The company president is Shelley Couts, who inherited the company. When it was founded over 70 years ago, the company originally repaired radios and other household appliances. Over the years, the company expanded into manufacturing and is now a reputable manufacturer of various electronic items. Jay McCanless, a recent MBA graduate, has been hired by the company’s finance department.
One of the major revenue-producing items manufactured by Conch Republic is a personal digital assistant (PDA). Conch Republic currently has one PDA model on the market, and sales have been excellent. The PDA is a unique item in that it comes in a variety of tropical colors and is preprogrammed to play Jimmy Buffett music. However, as with any electronic item, technology changes rapidly, and the current PDA has limited features in comparison with newer models. Conch Republic developed a prototype for a new PDA that has all the features of the existing PDA but adds new features such as cell phone capability. The company has performed a marketing study to determine the expected sales figures for the new PDA.
Conch Republic can manufacture the new PDA for $200 each in variable costs. Fixed costs for the operation are estimated to run $4.5 million per year. The estimated sales volume is 70,000, 80,000, 100,000, 85,000, and 75,000 per each year for the next five years, respectively. The unit price of the new PDA will be $340. The necessary equipment can be purchased for $16.5 million and will be depreciated on a 5 year straight-line schedule.
Net working capital investment for the PDAs will be $6,000,000 the first year of operations. Of course NWC will be recovered at the projects end. Conch Republic has a 35 percent corporate tax rate and a 12 percent required return.
Shelly has asked Jay to prepare a report that answers the following questions:
(A) What is the IRR of the project?
(B) What is the NPV of the project, based on the required rate of return of 12%?
Answer

What is the “tenure with company” distribution by gender?

Explain the value of statistics and its contribution to the success of an organization

What is the “tenure with company” distribution by gender?

Explain the value of statistics and its contribution to the success of an organization.

What is the distribution of individuals by gender?

What percentage of the survey participants are in each department?

What is the sample mean for extrinsic value by gender?

What is the probability that an individual will be between 16–21 years of age?

What is the probability that an individual’s overall job satisfaction is 5.2 or lower?

What is the probability that an individual will be a female in the human resources department?

What is the probability that an individual will be a salaried employee whose intrinsic satisfaction value is 5 or more?

RESEARCH REQUIRED: Be sure to include other ways that probability is used in business specifically how it contributes to the success of an organization.

Identify the significance level, the test statistic, and the critical value.

Intrinsic by Gender and Extrinsic by Position

TEST #1

Perform the following two-tailed hypothesis test, using a .05 significance level:

 

  • Intrinsic by Gender

 

  • State the null and an alternate statement for the test

 

  • Use Microsoft Excel (Data Analysis Tools) to process your data and run the appropriate test. Copy and paste the results of the output to your report in Microsoft Word.

  • Identify the significance level, the test statistic, and the critical value.

  • State whether you are rejecting or failing to reject the null hypothesis statement.

  • Explain how the results could be used by the manager of the company.

TEST #2

Perform the following two-tailed hypothesis test, using a .05 significance level:

 

  • Extrinsic variable by Position Type

 

  • State the null and an alternate statement for the test

 

  • Use Microsoft Excel (Data Analysis Tools) to process your data and run the appropriate test.

 

  • Copy and paste the results of the output to your report in Microsoft Word.

 

  • Identify the significance level, the test statistic, and the critical value.

 

  • State whether you are rejecting or failing to reject the null hypothesis statement.

 

 

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  • Explain how the results could be used by the manager of the company.

Which pricing method does the producer prefer?

Suppose adults have the demand curve p=30-(2/5) quantity for tickets to local community

Suppose adults have the demand curve p=30-(2/5) quantity for tickets to local community theater. Children have a demand curve of p=10-(1/5) quantity. Furthermore, marginal cost = average cost = 4

1) Determine the price charged and number of tickets sold in each separate market. Draw a graph for each market.

2) Determine the total consumer surplus and the total producer surplus; Label these areas on your Graph.

3) Now, assume the theater wants to charge a single, uniform price in both markets. Draw a graph of the combined demand, and show the uniform price charged and total amount sold as well as the total consumer and producer surplus.

4) Determine consumer surplus, producer surplus with a uniform price. Label these areas on the graph.

5) Which pricing method does the producer prefer?

Answer
Submitted by shri21 on Sat, 2016-02-06 05:09