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| distribution with a moderate degree of peakedness |
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| vast majority of the scores tend to be located in the center of distribution |
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| uniformaly distributed but many scores still cluster at the center |
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| a central point on the scale of measurement, between the extreme scores in the distribution around which the scores are distributed |
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| the arithmetric average of the scores in a distribution |
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| the point on the scale of meansurement below which 50 percent of the scores fall |
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| the most frequent score in a distribution of scores |
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| the number of observations in a sample |
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| a descriptive measure of a population |
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| variables that a researcher controls or manipulates in accordance with the purpose of the investigation |
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| a measure that of the effect of the independent variable. |
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| classifies objects into categories based on some defined characteristic |
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| classify objects or characteristics but also have a logical oder to the classification. i.e. letter grading system. data categories are mutually exclusive. have some logical order. scaled according to the amt of the particular characteristic they posses. |
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| all properties of ordinal scales plue one additional property. equal differences in the characteristic measured. data categories are mutually exclusive, have a logical order, scaled according to the characteristic they possess, equal differences in the characteristics, the point 0 is just another point on the scale. |
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