REC 359 Lecture Notes - Lecture 9: Simple Random Sample, Sampling Bias, Snowball Sampling
Document Summary
Sampling frame- the people we actually study/sample, pretty much all of the population: ex: wilmington surf film festivals anyone over the age of 18 who comes to the festival. Probability sampling- the general term for samples selected in accordance with probability theory, random selection. Random selection- a sampling method in which each element has an equal chance of selection independent of any other event in the selection process. Simple random sampling- a type of probability sampling in which the units composing a population are assigned numbers: a set of random numbers is generated and the used. Systematic sampling- sampling using ever #th unit. Ex: line up people and every 3rd person will be part of your sample. Cluster sampling- sampling where natural groups are sampled initially, with the members of each selected group being subsampled afterwards. Ex: pick unc, uncw, and duke and then picks people from each college to look at.
