If researchers must rely on volunteers does this procedure guarantee that he/she is using a representative sample in their research? Why or why not? Is this limitation a serious problem for quantitative researchers? Why or why not?

the first settlements began along the huang river because of the importance of the huang river in the beginning of china. it goes back to the story, “the tale of emperor yu”, which references the tale of the great flood, which was caused by the huang river and was believed to create and influence china’s making.

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