As a side note, other approaches have been described to compute the weighted sample variance.
2.
When a weighted mean \ mu ^ * is used, the variance of the weighted sample is different from the variance of the unweighted sample.
3.
Counties in the 9 provinces were stratified by income ( low, middle, and high ) and a weighted sampling scheme was used to randomly select four counties in each province.
4.
On the general question of the use of ground troops, The Sunday Times weighted sample of 506 adults on Friday and Saturday, says 51 percent would be in favor and 43 percent opposed.
5.
Of 17, 634 usable answer sheets re�turned to the researchers, a weighted sample of 2000 scores for each of the three grade levels representative of the makeup of the school sample was selected for analysis.
6.
After Gallup collects and processes survey data, each respondent is assigned a weight so that the demographic characteristics of the total weighted sample of respondents match the latest estimates of the demographic characteristics of the adult population available from the U . S . Census Bureau.
7.
In a weighted sample, each vector \ textstyle \ textbf { x } _ { i } ( each set of single observations on each of the " K " random variables ) is assigned a weight \ textstyle w _ i \ geq0.
8.
In a weighted sample, each row vector \ textstyle \ textbf { x } _ { i } ( each set of single observations on each of the " K " random variables ) is assigned a weight \ textstyle w _ i \ geq0.
9.
Located on PostGlobal, washingtonpost . com and Newsweek . com s panel blog on international issues, the Global Power Barometer ( GPB ) is a visual monitor updated each weekday by the research firm Denver Research Group, Inc . ( DRGI ) using a weighted sample of sources from the media, academia, governments, and NGOs from around the world.
10.
For example, if values \ { 2, 2, 4, 5, 5, 5 \ } are drawn from the same distribution, then we can treat this set as an unweighted sample, or we can treat it as the weighted sample \ { 2, 4, 5 \ } with corresponding weights \ { 2, 1, 3 \ }, and we get the same result either way.
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