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# DATA ANALYSIS

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```									Security, Controls,              Database (Data Repository)     Analysis, Interpretation,
Accuracy, Privacy                Accounting, Production, etc. Decision Making
DATA ANALYSIS, INTERPRETATION, DECISION PROJECTS
Planning
Clear Objective or Question—Be Specific
Why Important?
Identify Data that can meet objective or answer question (population)
Methodology—What tests or modeling will answer the question or meet the
objective
Data Access
Source or data, (Database or data repository)
How to locate, what form is data in, and how to transfer
If a Sample—Is the data an unbiased sample of the population?
Data Integrity Verification (Security, Controls, Accuracy)
Is the data accurate and reliable?
Any missing data? Decide how to handle missing data
Data preparation—Get data in appropriate form for Data Analysis
Descriptive Data Analysis
Tests: Statistical, Common Sense
Outliers—How may they influence analysis & results?
Report Results
Do results answer the question or meet the objective defined in planning?
Are results reasonable? (common sense)
Conclusions
Do conclusions really follow from the results? (Do results support
conclusion?)
Be careful about implications of cause and effect
State Limitations & Assumptions
Predictive Data Analysis: Linear Regression, nonlinear regression, neural networks, etc.
Descriptive Data Analysis helps researcher understand the underlying data
Build model from past experience of data to predict future outcomes
Use independent or predictive variables to predict the dependent or
outcome variable(s)
Usually have a model building sample, a testing sample (data sample used
to give feedback during model building), and a holdout sample
Report ting Results
Do results answer the question or meet the objective defined in planning?
Are results reasonable? (common sense)
Is the model generalizeable to the holdout sample?
(the data not used to build the model
Conclusions
Do conclusions really follow from the results? (Do results support
conclusion)
Be careful about implications of cause and effect
State Limitations & Assumptions

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