| NOUN | cognition | second moment | the expected value of the square of the deviations of a random variable from the point of origin |
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| Meaning | The expected value of the square of the deviations of a random variable from the point of origin. | |
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| Category | statistics | A branch of applied mathematics concerned with the collection and interpretation of quantitative data and the use of probability theory to estimate population parameters |
| Broader | moment | The n-th moment of a distribution is the expected value of the n-th power of the deviations from a fixed value |
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