| Continuous variable | A quantitative variable that can assume any value within a range.
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| Descriptive statistics | Methods of organizing, summarizing, and presenting data in an informative way.
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| Discrete variable | A quantitative variable that can only assume certain values. There is a “gap” between the values.
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| Inferential statistics | The methods used to estimate something about a population, based on a sample.
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| Interval level | Includes the ranking characteristics of the ordinal scale and, in addition, the difference between values is a constant size.
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| Nominal level | A level of measurement in which the data are sorted into classes with no particular order to the classes.
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| Ordinal level | A level of measurement that presumes that one category is ranked higher than another category.
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| Population | The entire set of all individuals or objects of interest or the measurements obtained from all individuals or objects of interest.
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| Qualitative variable | A variable that has the characteristic of being nonnumeric.
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| Quantitative variable | A variable being studied that can be reported numerically.
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| Ratio level | Has all the characteristics of the interval scale, but additionally there is a meaningful zero point and the ratio of two values is meaningful.
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| Sample | A portion, or part, of the population of interest.
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| Statistics | The science of collecting, organizing, presenting, analyzing, and interpreting data to assist in making more effective decisions.
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