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DATA ANALYSIS

MADE BY:MANI GARG

UBS,CHANDIGARG

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Analysis

• Analysis is the process of breaking a complex topic or substance into smaller parts to gain a better understanding of it.

• The technique has been applied in the study of mathematics and logic since before Aristotle, though analysis as a formal concept is a relatively recent development[1].

• The word is a transcription of the ancient Greek ἀνάλυσις (analusis), "a breaking up" (from ana- "up, throughout" and lysis "a loosening").[

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Analysis of data

Analysis of data is a process of • inspecting,• cleaning, • transforming, • modeling data

with the goal of • highlighting useful information, • suggesting conclusions, • supporting decision making.3

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Descriptive statistics

• Descriptive statistics are used to describe the main features of a collection of data in quantitative terms.

• Descriptive statistics are distinguished from inferential statistics, in that descriptive statistics aim to quantitatively summarize a data set, rather than being used to support inferential statements about the population that the data are thought to represent.

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Example…

Most statistics can be used either as a descriptive statistic, or in an inductive analysis. For example, we can report the average reading test score for the students in each classroom in a school.

Some statistical summaries are especially common in descriptive analyses. Some examples follow.

• Measures of central tendency • Measures of dispersion • Measures of association • Histogram 5

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Tabulation

• Simple tabulation• Frequency tabulation

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• Percentage Cumulative percentage Frequency distribution

• Central tendency

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Cross tabulation

• Cross-tabulation

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• Contingency tables

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• Percentage cross tabulation.

• Elaboration analysis Moderator Spurious relationship

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• Quadrant AnalysisQuadrant analysis is a

simple way to organize customer satisfaction data into a story that will tell you how and where to improve your business operations. Quadrant analysis prioritizes your activities and transforms dry data into a diagnostic tool.

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Data transformation.

• Collapsing and combining• Strongly Agree• Agree• Neither Agree nor Disagree• Disagree• Strongly Disagree

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•Strongly Agree/Agree

•Neither Agree nor Disagree

•Disagree/Strongly Disagree

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• Calculating Rank Order

Charts and Graphs

• Pie charts• Line graphs• Bar charts– Vertical– Horizontal

Computer Programs• SPSS• SAS• SYSTAT• Microsoft Excel• WebSurveyor

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Interpretation

• Definition.• An example

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