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weighted average

an average calculated to take into account the relative importance of the items making up the average: Different values or weights are assigned to different data points to reflect their relative contribution. For example, in examining grade-point average, one might give grades A through F the weights of 4, 3, 2, 1, and 0, respectively. One would multiply the number of A grades a student obtained by 4, the number of B grades by 3, and so forth and then divide the resulting sum by the total number of grades to obtain the student’s overall weighted average. Also called weighted mean.

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Psychology term of the day

June 18th 2024

two-parameter model

two-parameter model

in item response theory, a model that specifies two parameters affecting an individual’s response to a particular test item: (a) the difficulty level of the item and (b) the item discriminability. See also Rasch model; three-parameter model.