APA Dictionary of Psychology

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.