2 - Frequency Distributions

2 - Frequency Distributions - Scales of Measurement 4...

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Scales of Measurement 4 Levels of Measurement Nominal Ordinal Interval Ratio
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Interval and ratio scales have equal spaces between categories Therefore, you can manipulate the scale values, and still maintain this relationship.
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0 1 2 3 4 5 6…… Multiply each score by six…. 0 6 12
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Chapter 2: Frequency Distributions, Percentiles, and Percentile Ranks
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Chapter 2: Frequency Distributions, Percentiles, and Percentile Ranks Today we begin discussion on ways to organize our data
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“How concerned are you about math in this course?” 50 70 95 30 60 0 50 50 10 80 75 60 70 65 50 30 20 10 1 1 4 70 9 60 85 55 40 80 80 95 1 22 60 65 5 40 75 N = 37
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Many possibilities for organization One of the simplest is a Frequency Distribution Lists possible values in set Lists number of times each value was observed Be sure to include every possible value between the highest and lowest score, even if it was not selected
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95 2 94 0 93 0 92 0 91 0 90 0 89 0 88 0 87 0 86 0 85 1 84 0 83 0 82 0 81 0 80 3 79 0 78 0 77 0 76 0 75 0 74 0 73 0 72 0 71 0 70 3 69 0 68 0 67 0 66 0 65 2 64 0 63 0 62 0 61 0 60 4 59 0 58 0 57 0 56 0 55 1 54 0 53 0 52 0 51 0 50 4 49 0 48 0 Score f Score f Score f Score f 47 0 46 0 45 0 44 0 43 0 42 0 41 0 40 2 39 0 38 0 37 0 36 0 35 0 34 0 33 0 32 0 31 0 30 2 29 0 28 0 27 0 26 0 25 0 24 0 23 0 22 1 21 0 20 1 19 0 18 0 17 0 16 0 15 0 14 0 13 0 12 0 11 0 10 2 9 1 8 0 7 0 6 0 5 1 4 1 3 0 2 0 1 2 0 1
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Can give you a sense of where you stand in relation to others However with such a large range, can be overwhelming to look at. Not a large enough N to cover the whole range of
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2 - Frequency Distributions - Scales of Measurement 4...

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