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The Variance of the Sum of Two Random Variables Is

question 32

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The variance of the sum of two random variables is the sum of their variances plus two times the covariance.


Definitions:

Cortex

The outermost layer of the brain, known for its role in important functions including thought, memory, consciousness, and language.

White Matter

Brain tissue comprising mainly of myelinated nerve fibers, which connect different parts of grey matter to each other.

Nerve Fibers

Long, threadlike extensions of neurons that transmit electrical impulses away from the neuron's cell body, facilitating communication within the nervous system.

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