Spd 338 test1 part 2
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21 terms
Terms | Definitions |
|---|---|
 Raw score | The number of questions correct. Does not tell you much! |
| Nominal scale | A number that identifies (A number on the back of a runner in a race) |
| Ordinal Scale | Listing a rank in order |
| Interval scale | Numbers are ranked and have an equal distance between each number |
| Ratio scale | An interval scale but it has an absolute zero therefore you can do mathematics with it. |
| Derived scores | Scores obtained by using a raw score and expectancy tables. |
| Standard Scores | A derived score that represents equal units within a linear scale. |
| Measures of central tendency | Statistical methods for observing how data cluster around the mean |
| Normal distribution | A symmetrical distribution with a single numerical representation for the mean, median, and mode. |
| Frequency distribution | Method of determining how many times each score occurs in a set of data. |
| Mode | The most frequently occurring score in a set of scores. |
| Median | The middle most score in a set of data |
| Mean | ... |
| Standard Deviation | A unit of measurement that represents the typical amount that a score can be expected to vary from the mean in a given set of data. |
| Measures of Dispersion | Statistical methods for observing how data spread from the mean in a given set of data. |
| Variance | Describes the total amount that a group of scores varies in a set of data. |
| Range | The distance between the highest and lowest scores in a data set. |
| Skewed | Describes a distribution that has either more positively distributed scores or more negatively distributed scores. |
| Positively skewed | Describes a distribution in which more of the scores fall below the mean. |
| Negatively skewed | Describes a distribution in which more of the scores fall above the mean. |
| Percentile Ranks | Scores that express the percentage of students who scored as well as or better than a given students score |
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