Researchers wanted a representative sample ofJapanese-Americans living in San Fr

Question

Researchers wanted a representative sample ofJapanese-Americans living in San Francisco. "The procedurewas as follows. After consultation with representativefigures in the Japanese community, the four most representativeblocks int the Japanese area of the city were chosen; all personsresident in those four blocks were taken for the sample. However, a comparison with Census data shows that the sample didnot include a high-enough proportion of Japanese with collegedegrees".

a. What kind of sampling did this study use? b. Why do you suppose the sample did not have enoughcollege graduates?
c. Can you think of a way to improve this samplingscheme? Researchers wanted a representative sample ofJapanese-Americans living in San Francisco. "The procedurewas as follows. After consultation with representativefigures in the Japanese community, the four most representativeblocks int the Japanese area of the city were chosen; all personsresident in those four blocks were taken for the sample. However, a comparison with Census data shows that the sample didnot include a high-enough proportion of Japanese with collegedegrees".

a. What kind of sampling did this study use? b. Why do you suppose the sample did not have enoughcollege graduates?
c. Can you think of a way to improve this samplingscheme?

Explanation / Answer

a) This is a simple random sample of Japanese-Americans living inSan Francisco. b) Becuause, Japanese with college graduates must be arepresentative sample of the population. c) A probability sampling scheme is one in which every unit inthe population has a chance (greater than zero) of being selectedin the sample, and this probability can be accuratelydetermined

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