| http://www.w3.org/ns/prov#value | - I disagree with both statements: ???The formulas for simple random samples should not be applied mechanically to other kinds of samples??? and ???With samples of convenience, standard errors usually do not make sense.??? Or perhaps I should say that these statements are not well defined: I don???t know what is meant by ???mechanically??? nor do I know what population is being referred to by ???usu
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