Population–the entire collection of objects whose properties are to be analyzed in a particular study. Sample –a subset of the population. Variable–any characteristic of interest for each object in a population or a sample. Observation –the set of measurements obtained for a particular object. Parameter–a numerical value summarizing the population data. Statistic –a numerical value summarizing the sample data. Qualitative/Categorical variablesuse labels or names to identify an attribute of an element. Each data value belongs to one of a set of categories. Quantitative/Numerical variablesuse numeric values that represent different magnitudes of the variable. Discrete variable–a quantitative variable that can take on only a finite or at most a countably infinite number of values. Intuitively, a discrete variable can assume values corresponding to isolated points along a line interval. That is, there is a gap between any two values.
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- Fall '08
- Standard Deviation, Mean, #