CS计算机代考程序代写 Department of Statistical Sciences

Department of Statistical Sciences

Time Series Analysis

STA457H1/STA2202H F-LEC5101

Final Project, Fall 2021

Due: Dec 17th, 2021 at 5.00 pm EST

The project will involve analyzing time-series data and writing a brief report. First,

you will need to choose a suitable time series. You can select a data set either from

the “astsa” library that we used for this course https://cran.r-project.org/web/

packages/astsa/astsa.pdf or any other resources. Choose a time series that

• interests you,

• is not too small it should have more than 100 observations,

• can easily be made approximately stationary

• is a different time series chosen from the lecture notes, quizzes, and assignments.

Data Analytic Strategies:

• Perform adequate exploratory analysis of the data and provide a concise presentation

of the results:

– exploring the time series plot and examining the properties of a stationary

process

– apply some transformations to convert as a stationary process

• Identifying the dependence orders of an ARIMA or SARIMA model and propose at

least two models.

• The model building used to address the problem of interest:

– estimate the parameters for the proposed models

– provide precise interpretations of the parameters in your model in the context

of the scientific problem

– test the significance of the parameter estimates

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• Perform all necessary diagnostics for the proposed models.

• Model Selection:

– if you have two or more models that satisfy the models’ assumptions, you can

pick the best model based on model selection criteria.

• Forecasting:

– after deciding on an appropriate model, forecast the data into the future ten-

time periods ahead

– give the 95% prediction intervals for each of the ten forecasts

– comment

• Spectral Analysis:

– perform a periodogram analysis to identify the first three predominant periods

– obtain the confidence intervals for the identified periods

– interpret your findings

General Guidelines on the Report:(Total 50 pts)

Your final analysis should be presented in the PDF form of a brief report maximum

of ten double-spaced pages (font size 12), including relevant tables and figures. Your

report should be structured as follows:

• Abstract – A brief summary of your primary findings. (5 pts)

– Background

– Methods

– Results

– Conclusions

– Keywords

• Introduction – A brief introduction/motivation to the problem at hand, relevant

details about the data, additional relevant scientific information from searching the

web, for example, and what is to be addressed. (5 pts)

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– Motivation to the problem .

– Relevant details about the data.

– Cite relevant literature to support your explanation.

– Purpose of the report.

– Conclude the introductory paragraph with the report statement.

• Statistical Methods – A discussion and justification of the methods you have used

to analyze the data and how you went about analyzing the data. Don’t forget to

describe in some detail how and why the particular model was selected. (10 pts)

– Exploring the time series plot.

– Examining the properties of a stationary process.

– Apply some transformations or differencing to convert as a stationary process.

– Identifying the dependence orders of an ARIMA or SARIMA model and pro-

pose at least two models.

• Results – A presentation of the results of your finding from data analytic strategies.

(25 pts)

– Estimate the parameters for the proposed models.

– Provide precise interpretations of the parameters in your model in the context

of the scientific problem.

– Test the significance of the parameter estimates.

– Perform all necessary diagnostics for the proposed models.

– Model Selection.

– Forecast the data into the future ten-time periods ahead and give the 95%

prediction intervals for each of the ten forecasts.

– Perform a spectral snalysis to identify the first three predominant periods and

obtain the confidence intervals for the identified periods.

• Discussion – A synopsis of your findings and discuss the limitations your model may

suffer from. Present the conclusions in terms that non-statisticians will understand.

Outline any limitations of your findings, and possibly suggest directions for further

research. (5 pts)

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**Graduate students will be required to submit a report and 5 minutes recorded

presentation for their final project. (Presentation worth 20 pts)

• Introduction/Opening (10 pts)

– Objective and motivation of your project

– What are you trying to accomplish in your project?

– What interests you about your topic?

– Why do you think your topic is important or interesting?

– Give your listeners a road map of your presentation

• Body of Presentation (5 pts)

– Statistical Methods

– Results

• Conclusion/Closing (5 pts)

– Summarize your major findings on your project

– Outline any limitations of your findings, and possibly suggest directions for

further research

• The written final report (maximum 10 pages including figures, summary

tables, double spaced (font size 12) is due Dec 17th, 2021 at 5.00 pm

EST. You can include Bibliography as an 11th page if you want.

• Upload your pdf version of the final project report by clicking the “Final

Project” submission link under the week 13 module. Please don’t include

any R code in the report, but you can upload the rmd version of the R

code as a supporting document.

• Late project will be accepted but subject to a 20% penalty per day late.

Late submissions will not be allowed beyond 48 hours of the due date..

• The written final report with more than ten pages will be accepted but

subject to a 10% penalty per page.

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• This final project must be completed independently. Please ensure you

all follow academic integrity, including plagiarism, falsifying information,

submitting work completed by someone else and unauthorized collabo-

ration and sharing test questions or answers. If I confirmed any accused

of cheating, the students involved would receive a 0% for the course (not

just the Final Project).

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