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Basic Data Analysis

Basic Data Analysis. Chapter 14. Overview. Descriptive Analysis. Tabulation. Tabulation Frequency table Percentages Central tendency. Cross-Tabulation. Contingency Table Marginals Percentage Cross-Tabulation Base Elaboration and Refinement Elaboration analysis Moderator variable

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Basic Data Analysis

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  1. Basic Data Analysis Chapter 14

  2. Overview • Descriptive Analysis

  3. Tabulation • Tabulation • Frequency table • Percentages • Central tendency

  4. Cross-Tabulation • Contingency Table • Marginals • Percentage Cross-Tabulation • Base • Elaboration and Refinement • Elaboration analysis • Moderator variable • Spurious relationship

  5. Data Transformation • Calculating Rank Order

  6. Displaying & Analyzing Data • Tabular & Graphic Methods of Data Display • Table • Charts and graphs • Pie chart • Line graph • Bar charts • Analysis Software

  7. Hypothesis Testing • Hypothesis • Null hypothesis • Alternative hypothesis

  8. Hypothesis Testing • Hypothesis-Testing Procedure • Develop hypothesis • Take sample and calculate sample statistics • Check for difference between obtained and expected value • Significance level • p>α • p< α • Critical values

  9. Example Problems • Page 362

  10. Chi-square Test • Formulate null hypothesis and determine expected frequency of each answer • Determine the significance level • Calculate Χ2 value • Compare calculated X2 with critical X2

  11. Chi-Square Testing • X=Σ(Oi-Ei)2/Ei • Degrees of Freedom • Page 365

  12. Choosing the Appropriate Technique • Number of Variables • Univariate v. Bivariate • Scale of Measurement • Type of Questions

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