BUEC 232 Chapter 3: BUEC232 - Ch.03 Notes

• School: Simon Fraser University
• Department: Business Economics
• Course: BUEC 232
• Professor: George Zhang

Document Summary

Are data that were produced in the past for some other purpose but that may help answer a present question, e. g. data from library, internet: anecdotal evidence. Based on our own and others" experience: sampling observations & experiments. (observation) observe individuals and measure variables of interest but do not attempt to influence the response. (experiment) deliberately impose some treatment on individuals and observe their response. Consists of people who choose themselves by responding to a general appeal. Biased as people with strong opinions, especially negative opinions, are most likely to respond: probability sample. Must know what samples are possible and what chance/probability, each possible sample has. Srs to form the full sample: select successively smaller groups within the population in stages, resulting in a sample consisting of clusters of individuals, each stage may employ an srs, a stratified sample, or another type of sample.