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(Ch 19, stat 1040)
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| Term | Definition |
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| ---- | ---- |
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| Qualitative | A descriptive value (red, blue, high, low) |
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| Quantitative | A numerical value (7, 8, 9) |
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| Population | The entire set of existing units that investigators wish to study |
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| Sample | A portion or subset of the population |
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| Parameter | A number that describes a characteristic of a *population* (*10%* of US senators voted for something) |
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| Statistic | A number that describes a *sample* characteristic (*71%* of Americans feel that ...) |
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