Transcription of Chapter 2: Frequency Distributions - My Websites
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Chapter 2: Frequency Distributions - My Websites
Chapter 2: Frequency Distributions Control Group Experimental Group 25 32 28 29. 27 20 25 31. 28 23 31 19. 17 21 29 35. 24 34 30 28. 22 29 24 30. 24 25 33 27. 21 18 34 26. 19 22 29 29. 30 24 27 32. 26 27 30 36. 24 23 22 23. 23 25 32 33. Control Group Experimental Group 16 18 20 22 24 26 28 30 32 34 16 18 20 22 24 26 28 30 32 34 36 Exam Score Exam Score 2 Example 8, 9, 8, 7, 10, 9, 6, 4, 9, 8, 7, 8, 10, 9, 8, 6, 9, 7, 8, 8, x f 10 2. 9 5. 8 7. 7 3. 6 2. 5 0. 4 1. 3 1 Example 8, 9, 8, 7, 10, 9, 6, 4, 9, 8, 7, 8, 10, 9, 8, 6, 9, 7, 8, 8, x f fx 10 2 20. 9 5 45. 8 7 56. 7 3 21. 6 2 12. 5 0 0. 4 1 4. 4 Example 8, 9, 8, 7, 10, 9, 6, 4, 9, 8, 7, 8, 10, 9, 8, 6, 9, 7, 8, 8, x f p=f/N %=p(100). 10 2 2/20= 10%. 9 5 5/20= 25%. 8 7 7/20= 35%.
3 7 Forming Class Intervals of a Grouped Frequency Distribution 1. Approximately 10 class intervals 2. Interval width a relatively simple number
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