Difference between grouped and ungrouped data

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  1. Course Title: Business Statistics BBA (Hons) 2nd Semester Lecture No:2 Course Instructor: Atiq ur Rehman Shah Lecturer, Federal Urdu University of Arts, Science &…
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  • 1. Course Title: Business Statistics BBA (Hons) 2nd Semester Lecture No:2 Course Instructor: Atiq ur Rehman Shah Lecturer, Federal Urdu University of Arts, Science & Technology, Islamabad +92-345-5271959 aatresh@gmail.com
  • 2. Learning Objectives • Recognize the difference between grouped and ungrouped data • Construct a frequency distribution • Data Range
  • 3. Ungrouped Versus Grouped Data • Ungrouped data • have not been summarized in any way • are also called raw data • Grouped data • have been organized into a frequency distribution
  • 4. Example of Ungrouped Data 42 30 53 50 52 30 55 49 61 74 26 58 40 40 28 36 30 33 31 37 32 37 30 32 23 32 58 43 30 29 34 50 47 31 35 26 64 46 40 43 57 30 49 40 25 50 52 32 60 54 Ages of a Sample of Managers from Urban Child Care Centers in the United States
  • 5. Frequency Distribution of Child Care Manager’s Ages Class Interval Frequency 20-under 30 6 30-under 40 18 40-under 50 11 50-under 60 11 60-under 70 3 70-under 80 1
  • 6. Data Range 42 30 53 50 52 30 55 49 61 74 26 58 40 40 28 36 30 33 31 37 32 37 30 32 23 32 58 43 30 29 34 50 47 31 35 26 64 46 40 43 57 30 49 40 25 50 52 32 60 54 Smallest Largest Range = Largest - Smallest = 74 - 23 = 51
  • 7. Data Range 42 30 53 50 52 30 55 49 61 74 26 58 40 40 28 36 30 33 31 37 32 37 30 32 23 32 58 43 30 29 34 50 47 31 35 26 64 46 40 43 57 30 49 40 25 50 52 32 60 54 Smallest Largest Range = Largest - Smallest = 74 - 23 = 51
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