Business Statistics

268 Business Statistics

researcher uses a respondent to collect information about another respondent. When information about

the subjects is not directly available, a researcher identies a person who will be able to provide details

of other respondents whose prole will t the study. Through referrals, respondents can be located

easily, which could otherwise be a difcult and expensive exercise. Snowball sampling method also

suffers from the non-randomness of the sample selection procedure.

8.8 SAMPLING AND NON-SAMPLING ERRORS

Research is rarely free from errors. During the research process, a researcher collects, tabulates, analy-

ses, and ...