HSS 2381 Lecture Notes - Lecture 1: Null Hypothesis

• School: University of Ottawa
• Department: Health Sciences
• Course: HSS 2381
• Professor: Kerry- Ann Hogan

Document Summary

Hss2381c dr. hogan: intro statistics data analysis. *statistic research cannot prove anything, it only supports. i. e we can"t prove that smoking causes lung cancer, research shows that it can be one of the causes, but its not 100% of smokers that get lung cancer. Quantitative research: about numbers; systematic scientific investigation of data and their relationships. Assessing hypotheses simply stated, single sentence, at least two variables, variables clearly stated, is the relationship/difference precisely stated, testable. Needs at least two variables to make a hypothesis. Directional hypothesis: precise statement indicating the nature and direction of the relationship/difference between variables. Make sense of the numbers that are indicated; suggest direction of the findings. Nondirectional hypothesis: states only that relationship/difference will occur. I. e your grades will change if you don"t come to class. Null hypothesis: implicit complementary statement to the research hypothesis; states no relationship/difference exists between variables. Element that is identified in the hypothesis or research question.