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Statistical Methods and Measurement scales

Presentation includes discussion of types of statistical methods and measurement scales

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Statistical Methods and Measurement scales

  1. 1. Statistical Methods and Measurement Scales Presented by Kristel May A. Sarzadilla
  2. 2. Statistics deals with • Collection • Organization • Presentation • Analysis • Interpretation
  3. 3. Statistical Methods
  4. 4. Descriptive Statistical Method  Descriptive statistics are used to describe the basic features of the data in a study. They provide simple summaries about the sample and the measures. Together with simple graphics analysis, they form the basis of virtually every quantitative analysis of data.
  5. 5. Correlational Method  Correlation is a statistical technique that can show whether and how strongly pairs of variables are related. For example, height and weight are related; taller people tend to be heavier than shorter people.
  6. 6. Inferential Method  We use inferential statistics to try to infer from the sample data what the population might think. Or, we use inferential statistics to make judgments of the probability that an observed difference between groups is a dependable one or one that might have happened by chance in this study.
  7. 7. Measurement Scales
  8. 8. Nominal Scale Used as measures of identity. Examples:  Religion  Sex
  9. 9. Ordinal Scales Used in measurement wherein numbers reflect the rank order of the individual or objects
  10. 10. Interval Scale  Provides numbers that reflect differences among items.  Measurement units are equal.  Has no reference to zero  MDAS has meaning
  11. 11. Ratio Scale  It has absolute zero.  M & D have meaning