Actuarial Science 1021A/B Lecture Notes - Lecture 2: Internal Validity, External Validity, Random Assignment

• School: Western University
• Department: Actuarial Science
• Course: Actuarial Science 1021A/B
• Professor: Irene Krajnyk

Document Summary

Basic(expanding understanding and knowledge in that paricular ield) research and applied(honing in to a speciic problem and trying to ix it) research. Hindsight bias: once you know the result of the study, there is a tendency that you assumed you knew the answer all along, aka. Hypothesis: a testable statement of the relaionship between two or more variables. They can come from exising theories, studies and personal observaions. Create a plan to measure/manipulate the variables of interest this is the operaional deiniion (ex. Scores on a test, feedback, giving assessment to sample) (measure-the data you are going to collect. Must rely on a sample, which is a subset of the populaion. Sample must be representaive of the populaion, so a random selecion method is employed. Manipulaing variables can be done in a study or an experiment, but no manipulaion can only be a study.