PEDS109 Lecture Notes - Stratified Sampling, Confounding, Random Assignment

• School: University of Alberta
• Department: Physical Education and Sport
• Course: PEDS109
• Professor: John Dunn

Document Summary

Descriptive stats: descriptive stats are statistical procedures used to summarize, organize and simplify data. Inferential stats: techniques that allow us to study samples, and then make generalizations about the population from which (sample participants) were selected. Inferential stats can only provide meaningful generalizations if my sample is representative of the population. Sampling design: random sampling or random selection helps increase the likelihood of having a sample that is representative of the population, every individual should have the same chance of being selected for the sample. Correlational research: relationships between variables as they naturally exist. There is no manipulation of any variables by the researcher. Limitation: cannot infer with any degree of certainty that a causal relationship exists. Researcher manipulates (at least) one of the independent variables. Researcher exercises maximum control over the research environment in an attempt to ensure that other extraneous variables don"t influence the results.