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Unit 1: Background to Inferential Statistics Lesson 1: Levels of Scale EDER 6010: Statistics for Educational Research Dr. J. Kyle Roberts University of North Texas
What is Statistics? ,[object Object],Used with permission: www.jasonlove.com ,[object Object],[object Object],[object Object],Next Slide
Levels of Scale Nominal Ordinal Interval Ratio Next Slide
Nominal Scaling ,[object Object],[object Object],[object Object],Next Slide Gender Ethnicity Profession Group
Ordinal Scaling ,[object Object],[object Object],[object Object],Next Slide Likert-type scales Letter Grades
Interval Scaling ,[object Object],[object Object],[object Object],Next Slide Temperature IQ Scores SAT/GRE Scores
Ratio Scaling ,[object Object],[object Object],[object Object],Next Slide Kelvin Scale Height/Weight Speed
Why so many levels? Only interval and ratio scales can be submitted to math operations Average gender??? Average ethnicity??? Next Slide
A few practice questions ,[object Object],[object Object],[object Object],[object Object],Which level of scale is implied by the following statement: “Jill’s score is three times greater than Eric’s score.” ,[object Object],[object Object],[object Object],[object Object],Next Slide
A few practice questions ,[object Object],[object Object],[object Object],[object Object],Which level of scale is implied by the following statement: “Addie had the highest score.” ,[object Object],[object Object],[object Object],[object Object],Next Slide
Unit 1: Background to Inferential Statistics Lesson 1: Levels of Scale EDER 6010: Statistics for Educational Research Dr. J. Kyle Roberts University of North Texas

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Unit 1 lesson 1

  • 1. Unit 1: Background to Inferential Statistics Lesson 1: Levels of Scale EDER 6010: Statistics for Educational Research Dr. J. Kyle Roberts University of North Texas
  • 2.
  • 3. Levels of Scale Nominal Ordinal Interval Ratio Next Slide
  • 4.
  • 5.
  • 6.
  • 7.
  • 8. Why so many levels? Only interval and ratio scales can be submitted to math operations Average gender??? Average ethnicity??? Next Slide
  • 9.
  • 10.
  • 11. Unit 1: Background to Inferential Statistics Lesson 1: Levels of Scale EDER 6010: Statistics for Educational Research Dr. J. Kyle Roberts University of North Texas