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13 Cards in this Set
- Front
- Back
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data in a sequence in which they are collected before they are processed or ranked (ungrouped data)
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raw data
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midpoint of the upper limitations of one class and the lower limit of the next class
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class boundaries
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upper boundary - lower boundary
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class width
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lower limit + upper limit / 2
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class midpoint
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f/Ef
percentage = rel. frequency *100 |
Relative Frequency and Percentage Distributions
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classes are marked on horizontal axis and either frequencies, relative frequencies, or percentages are marked on vertical axis
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histogram
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graph formed by joining the midpoints of the tops of successive bars in a histogram
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polygon
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cumulative frequency/ total observation in data set
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cumulative relative frequency
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curve for frequency distribution - joined by straight lines
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ogive
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for qualitative data - each value is identified in two portions
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stem and leaf display
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average - sum of all values/number of values
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mean
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value of middle term in a ranked data set
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median
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value that occurs at the highest frequency
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mode
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