Ch15_RM

January 16, 2018 | Author: Anonymous | Category: Math, Statistics And Probability, Statistics
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15-1

Part Four ANALYSIS AND PRESENTATION OF DATA

15-2 McGraw-Hill/Irwin

© 2003 The McGraw-Hill Companies, Inc.,All Rights Reserved.

Chapter Fifteen DATA PREPARATION AND DESCRIPTION

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Editing • Detects errors and omissions, • Corrects them when possible, and • Certifies that minimum data quality standards are achieved

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Editing (cont.) • Guarantees that data are – accurate – consistent with other information – uniformly entered – complete – arranged to simplify coding and tabulation

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Editing • Field Editing – translation of ad hoc abbreviations and symbols used during data collection – validation of the field results. • Central Editing

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Coding • Rules that guide the establishment of category sets – Appropriate to the research problem and purpose – Exhaustive – Mutually exclusive – Derived from one classification principle 15-7

Content Analysis for Coding • Measures the semantic content of a message • Researches the objective, systematic, and quantitative description of the content of a communication – Syntactical unit – Referential unit – Propositional unit – Thematic unit 15-8

Data Entry Options • Optical scanning • Voice recognition • Keyboard

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Data Entry Formats • Database with full screen editor • Spreadsheet

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Descriptive Statistics • Distribution Descriptors – Location – Spread – Shape

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Descriptive Statistics • Distribution Descriptors – Location • Central Tendency – Mean – Median – Mode

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Descriptive Statistics • Distribution Descriptors – Spread • Variance, • Standard Deviation, • Range, • Interquartile Range

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Descriptive Statistics • Distribution Descriptors – Shape • Skewness • Kurtosis

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