Sixteen classes are randomly selected from a school. Each of the students in the selected class is given a survey questionnaire to answer. What sampling is use?
Simple random sampling is the randomized selection of a small segment of individuals or members from a whole population. It provides each individual or member of a population with an equal and fair probability of being chosen. The simple random sampling method is one of the most convenient and simple sample selection techniques.
2. Systematic sampling
Systematic sampling is the selection of specific individuals or members from an entire population. The selection often follows a predetermined interval (k). The systematic sampling method is comparable to the simple random sampling method; however, it is less complicated to conduct.
3. Stratified sampling
Stratified sampling, which includes the partitioning of a population into subclasses with notable distinctions and variances. The stratified sampling method is useful, as it allows the researcher to make more reliable and informed conclusions by confirming that each respective subclass has been adequately represented in the selected sample.
4. Cluster sampling
Cluster sampling, which, similar to the stratified sampling method, includes dividing a population into subclasses. Each of the subclasses should portray comparable characteristics to the entire selected sample. This method entails the random selection of a whole subclass, as opposed to the sampling of members from each subclass. This method is ideal for studies that involve widely spread populations.
Answers & Comments
1. Simple random sampling
2. Systematic sampling
3. Stratified sampling
4. Cluster sampling