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2013-05-23 12:21
求翻译:In each case, the sample employed was a stratified random sample. One stratum was a "certainty" stratum, consisting of the largest items, in which all items were selected for the sample. The other strata utilized sampling fractions of less than 100 percent. Since the strata sampling fractions were not equal, inferences是什么意思? 待解决
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In each case, the sample employed was a stratified random sample. One stratum was a "certainty" stratum, consisting of the largest items, in which all items were selected for the sample. The other strata utilized sampling fractions of less than 100 percent. Since the strata sampling fractions were not equal, inferences
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