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