expected value

the value of a random variable or one of its functions as derived by mathematical calculation rather than observation. It is symbolized by E(x), with x varying according to the specific item of interest that is being calculated. Usually, the expected value is a mean or weighted average.

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Psychology term of the day

November 16th 2024

chromatid

n. in cell division, one of the two duplicate, filamentlike subunits, joined at the centromere, that make up a chromosome and then separate, each going to a different pole of the dividing cell to become a new chromosome in one of the daughter cells.