sampling and its imp

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sampling and its implications

weighting

random sampling

random sampling and mail surveys

the inital list of people to whom the questionnaire is sent in a postal survey may be the whole population or a sample

random sampling in site/visitor/intercept surveys

stick strictly to this rule and do not select interviewees on any other basis

when you are ready with a new questionnaire stop the next person to enter the gate or entrance

when one interview is complete. check through the questionnaire for comleteness and legibility

quota sampling

random sampling in household surveys

multi-stage sampling

sampling for qualitative research

sample size

small populations

reporting size of sampling errors

budget

level of detail of analysis

confidence intervals

introduction

opinion polls and sample size

determinants of sample size

the available budget

the level of detail in the proposed analysis

the required level of precision in the results

samples and populations

the total category of subjects that is the focus of attention in a particular research project is known as the population