What is the value of the standard error

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Reference no: EM132373857

Statistics and Research Methods for Business Decision Making Group Assignment -

Purpose of the assessment - Students are required to show the understanding of the principles and techniques of business research and statistical analysis taught in the course.

Assignment Specifications -

Purpose: This assignment aims at Understand various qualitative and quantitative research methodologies and techniques, and other general purposes are:

1. Explain how statistical techniques can solve business problems.

2. Identify and evaluate valid statistical techniques in a given scenario to solve business problems.

3. Explain and justify the results of a statistical analysis in the context of critical reasoning for a business problem solving.

4. Apply statistical knowledge to summarize data graphically and statistically, either manually or via a computer package.

5. Justify and interpret statistical/analytical scenarios that best fits business solution.

Please read below information carefully and respond all questions listed.

Question 1 -

The planet may be threatened by climate change due to unsustainable activities, possibly caused by burning fossil fuels (petroleum, natural gas and coal) that produce carbon dioxide (CO₂). The table stored in file CO2 EMISSIONS.XLSX (in the course website) lists the top 15 producers of CO₂ (millions of metric tonnes) from fossil fuels in 2009 and 2013. Using this data, answer the questions below.

(a) Use an appropriate graphical technique to compare the amount of CO₂ emissions (in millions of metric tonnes) in 2009 and 2013, broken down by the producer countries.

(b) Use an appropriate graphical technique to compare the percentage value of the amount of CO₂ emissions (in %) in 2009 and 2013, broken down by the producer countries.

Question 2 -

The amount of time (in seconds) needed for assembly-line workers to complete a weld at a car assembly plant in Adelaide was recorded for 40 workers.

59	60	81	74	68	66	49	76	63	67
69	35	65	61	43	72	83	65	69	70
54	61	38	92	72	74	55	63	69	73
75	47	60	62	68	51	71	73	68	99

a. Construct a frequency distribution and a relative frequency distribution for the data.

b. Construct a cumulative frequency distribution and a cumulative relative frequency distribution for the data.

c. Plot a relative frequency histogram for the data.

d. Construct an ogive for the data.

e. What proportion of the data is less than 65?

f. What proportion of the data is more than 75?

Use following class intervals to answer the above questions

Classes	Frequency	Relative Frequency	Cumulative Frequency	Cumulative Relative Frequency
35 - 44
45 - 54
55 - 64
65 - 74
75 - 84
85 - 94
95 - 104

Question 3 -

Because inflation reduces the purchasing power of the dollar, investors seek investments that will provide protection against inflation; that is, investments that will provide higher returns when inflation is higher. It is frequently stated that ordinary shares provide just such a hedge against inflation. The annual Australian inflation rate (as measured by percentage changes in the consumer price index) and the annual All-Ordinaries Index from 1995 to 2015 are stored in file INFLATION.XLSX (in the course website).

Using EXCEL, answer below questions:

a. Using an appropriate graphical descriptive measure (relevant for time series data) describe the two variables.

b. Use an appropriate plot to investigate the relationship between RATE OF INFLATION and ALL-ORDINARIES INDEX. Briefly explain the selection of each variable on the X and Y axes and why?

c. Prepare a numerical summary report about the data on the two variables by including the summary measures, mean, median, range, variance, standard deviation, and coefficient of variation, smallest and largest values, and the three quartiles, for each variable.

d. Calculate the coefficient of correlation (r) between RATE OF INFLATION and ALL-ORDINARIES INDEX. Then, interpret it.

e. Estimate a simple linear regression model and present the estimated linear equation. Then, interpret the coefficient estimates of the linear model.

f. Determine the coefficient of determination R² and interpret it.

g. Test the significance of the relationship at the 5% significance level.

h. What is the value of the standard error of the estimate (s_e). Then, comment on the fitness of the linear regression model?

Attachment:- Business Decision Making Assignment & Data Files.rar

Reference no: EM132373857

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Reviews

len2373857

9/21/2019 12:23:53 AM

Submission Guidelines - All work must be submitted on Blackboard by the due date along with a completed Assignment Cover Page. The assignment must be in MS Word format, no spacing, 12-pt Arial font and 2 cm margins on all four sides of your page with appropriate section headings and page numbers. Reference sources must be cited in the text of the report, and listed appropriately at the end in a reference list using Harvard referencing style.

9/21/2019 12:23:46 AM

This is an applied assignment. Students have to show that they understand the principles and techniques taught in this course. Therefore students are expected to show all the workings, and all problems must be completed in the format taught in class, the lecture notes or prescribed text book. Any problems not done in the prescribed format will not be marked, regardless of the ultimate correctness of the answer. (Note: The questions and the necessary data are provided under "Assignment and Due date" in the Blackboard.)

9/21/2019 12:23:39 AM

Instructions: Your assignment must be submitted in WORD format only! When answering questions, wherever required, you should copy/cut and paste the Excel output (e.g., plots, regression output etc.) to show your working/output. Submit your assignment through Safe-Assign in the course website, under the Assignments and due dates, Assignment Final Submission before the due date. You are required to keep an electronic copy of your submitted assignment to re-submit, in case the original submission is failed and/or you are asked to resubmit. Please check your Holmes email prior to reporting your assignment mark regularly for possible communications due to failure in your submission.

9/21/2019 12:23:31 AM

Marking criteria - CO2 Emission analysis: 4 marks, Analysis of time of assembly: 8 marks and Estimation and testing significance level: 18 marks. Marking Rubric – Demonstration of very good knowledge on descriptive techniques. Demonstration of very good knowledge on descriptive measures. Demonstration of very good knowledge on correlation and regression analysis.

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