cluster sample

a method of SAMPLING which selects from groups (clusters) existing in the parent population, rather than assembling a RANDOM SAMPLE. This tends to be quicker and cheaper, but may lead to a BIASED SAMPLE if the clusters are not representative of the parent population. For example, polls taken of attitudes to government policy may be carried out in selected areas of the country thought to be representative, but, because of local political dynamics, this may not be the case.

单词	cluster sample
释义	cluster sample cluster sample a method of SAMPLING which selects from groups (clusters) existing in the parent population, rather than assembling a RANDOM SAMPLE. This tends to be quicker and cheaper, but may lead to a BIASED SAMPLE if the clusters are not representative of the parent population. For example, polls taken of attitudes to government policy may be carried out in selected areas of the country thought to be representative, but, because of local political dynamics, this may not be the case. cluster sample clus·ter sam·ple each sampling unit in a group of individuals.
随便看	haver bread haver cake have recourse to have recourse to it have recourse to (something) have recourse to something havered have regard to have regard to (something) have regard to something haverel have relations have relations with have relations with her have relations with him have relations with me have relations with someone have relations with them have relations with us have relations with you have report haverfield, francis john haverford haverford avenue branch library haverford college

cluster sample

cluster sample

cluster sample

clus·ter sam·ple