Term
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Definition
| Thing the experimenter varies, manipulates within the experiment. The cause. Always on the X axis |
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Term
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Definition
Result that are dependent from the sample. What the experiment measure.
The effect. Always on the Y axis |
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Term
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Definition
| Can be defined by the Mean, the Mode, or the Median. |
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Term
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Definition
Common average.
X(-)= sum of all the scores divided by N (number of scores). |
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Term
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Definition
X(~)
Middle value. Sort scores in ascending order. If the number of scores is odd, take the middle value. If it is even, take the mean of the middle value and the middle value+1. |
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Term
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Definition
Mo(X)
The most frequently-occurring value among the observations |
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Term
| Measure of Dispersion (Variability) |
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Definition
| A value that can describe the spread of scores around a central tendency. |
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Term
| Measure of dispersion related to the mean |
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Definition
| deviance, variance, standard deviation |
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Term
| Measure of dispersion related to the median |
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Definition
| range, interquartile range |
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