Action Plan
Sampling Techniques
Types of SamplingSimple Random Sample: equal chance
Systematic Sample: select members at regular interval which is divided sequentially (P.g. 114) Stratified Sample: Same proportion of members from each stratum as the population does (P.g. 115) Cluster Sample: If certain groups are likely to be representative of the entire population Multi - Stage Sample: uses several levels of random sampling. Voluntary-Response Sample: Invitation or volunteer Convenience Sample: |
Sampling BiasType of BiasSampling Bias:
- when the sampling frame does not reflect the characteristics of the population (P.g. 120) Non-response Bias: - lack of participation (P.g. 120) Measurement Bias: - data collection method consistently either under or overestimates a characteristic of the population (P.g. 121) Response Bias: - participants in a survey deliberately give false or misleading answers (P.g. 122) |