CMN 3102 Lecture Notes - Lecture 5: Null Hypothesis

• School: University of Ottawa
• Department: Communication
• Course: CMN 3102
• Professor: Ivan Katchanovski

Document Summary

Null hypothesis no difference between independent and dependent variable. Research hypothesis a statement about relationship between dependent and independent variable we want to prove of disprove. Independent variable used to explain dependent variable (affects dependent variable) Dependent variable variable we want to explain (affected by independent variable) Determines whether there is a relationship between independent and dependent variables. Examples adds to 101 and not 100 which means that the numbers have been rounded up, using canada as an example (40. 6 example) Independent variables in columns (levels of confidence in tv) Dependent variables in rows (countries: compare each row, compare us 46% with canada 40, this supports the research hypothesis that there is a difference between them (5%) and not a null hypothesis. Measures of association (cramer v + gamma) Cra(cid:373)er"s v 0 (no association) to 1 (perfect association: best for nominal.