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Related articles:
Average
Arithmetic mean
Variance
Key terms: math mean bar weighted sum frac sigma sample class y variance data weighted mean mathbf average decrease observations mu equal variable chi standard deviation values strength normalized weights class means sample variance students in each class unweighted unbiased zero if the observations sqrt expected average student grade then the weighted sample mean dots combination when all straight average step properties number of students in each estimator arithmetic error tail area Search external links cited by footnotes on Wikipedia page Weighted mean: |
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