SOCY 211 Lecture Notes - Lecture 3: Stratified Sampling, Spurious Relationship, Cohort Study

• School: Queen's University
• Department: Social Sci, Edu and Soc Work - Sociology
• Course: SOCY 211
• Professor: William Nelson

Document Summary

Module 2 key ideas: ideal sampling process. Units have known and non-zero probability of being included in your sample. (selecting units) Each sample has equal chance of being selected: observational studies: simple random, stratified clustered, case-control, cohort. Prospective vs. retrospective, correlation: experimental studies: control treatments, blocking, multiple factors, pseudo replication. Case study: sleeping to survive: study design: >65 years, cpap treatment offered to patients with ahi. Case study: toxic maize: study design: a sample of 40 patients and 80 healthy people randomly selected. 2. 1 simple random sampling: ideal sampling process. Units have known and non-zero probability of being included in your sample: not just people readily available. Unbiased: sample cannot have a systematic difference from the true population, units are equally likely to be included. Independent: selecting one unit in your sample should not influence whether another unit is being selected.