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18 Cards in this Set
- Front
- Back
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Nominal Data |
- no rank order - Yes/no question - gender, hair color |
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Ordinal |
- has rank order - distance between categories is not exact - horse race example
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Interval |
- has rank order, but has EXACT distance between categories - something very concrete - hours |
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Interval-like |
- answers like "highly likely, likely, neutral etc.) |
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Pie chart |
- for nominal data - shows differences between frequencies
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Bar graphs |
- nominal data |
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histogram |
- interval data - displays continuous measures - can also do ordinal |
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Levels of measurement |
what nominal ordinal and interval data is |
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what percentile tells us |
the percentage of cases in a distribution that falls at or below that specific score |
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the measures of central tendency |
- mean - median - mode
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Mean |
- sum of a set of scores divided by total # of scores - "center of gravity" - average - most precise - only used with Interval and interval-like data *when there is no skewed data |
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Median |
- middlemost point of data in correct order - when its ordinal or interval, NOT NOMINAL - great with skewed data
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Mode |
- most frequent number in distribution - can be used with nominal, ordinal or interval - if nominal, mode is the ONLY one you can use |
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range |
difference between highest and lowest scores R=H-L |
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deviation |
- how far away something is from the mean - tells us distance, but not direction |
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variance |
- the deviation squared - not in a useful level of interpretation |
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standard deviation |
- the average of deviations from the mean - this and variance only work with interval like or interval data - puts variance in a relavent answer |
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Measures of variance |
- range - deviation - variance - standard deviation |
