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7 Cards in this Set
- Front
- Back
Frequency Distribution
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A frequency distribution is an organized tabulation of the number of individuals in each category on the scale of measurement. |
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Symmetrical Distribution
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In a symmetrical distribution, it is possible to draw a vertical line through the middle so that one side of the distribution is a mirror image of the other.
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Skewed Distribution
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In a skewed distribution, the scores tend to pile up toward one end of the scale and taper off gradually at the other end.
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Tail
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The section where the scores taper off toward one end of a distribution is called the tail of the distribution.
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Positively Skewed / Negatively Skewed
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A skewed distribution with the tail on the right-hand side is positively skewed because the tail points toward the positive ( above zero ) end of the X-axis. If the tail points to the left, the distribution is negatively skewed.
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Rank ( Percentile Rank )
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The rank or percentile rank of a particular score is defined as the percentage of individuals in the distribution with scores equal to or less than the particular value.
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Percentile
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When a score is identified by its percentile rank, the score is called a percentile.
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