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8 Cards in this Set
- Front
- Back
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Nominal Scale |
- Sorts events by classification - E.g. taxonomy in biology |
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Ordinal scale |
- Sorts by order/ranking and often involves numeric values - Doesn't show the distance between items - E.g. customer surverys: rate your satisfaction on a scale of 1-5 |
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Interval scale |
- Shows order and distance between items - No real 0 - Can only do addition and subtraction - E.g. temperature: 20 degrees is 20 degrees colder than 40 degrees. However, you can't really say it's half as cold. |
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Ratio scale |
- Rank, distance, and real 0 - E.g. height and weight |
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Frequency distribution |
A list, table or graph that displays all possible outcomes of an event and their relative frequencies |
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Grouped distribution |
- Frequencies are assigned to groups of possibilities rather than particular possibilities.
- E.g. a grouped distribution of weight might include groups of 10 pound increments (between 100-110, 110-120, etc. ). - These 10 pound increments are called the CLASS INTERVAL |
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Midpoint of a class interval |
Usually the average between the lowest value in the group and highest value in the group |
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Histogram |
- Type of bar graph that displays frequency distribution - Bars are touching - Area under the graph adds up to 1 |
