COMM 2301 Lecture Notes - Lecture 8: Dependent And Independent Variables, Null Hypothesis, Type I And Type Ii Errors

• School: Northeastern University
• Department: Communication Studies
• Course: COMM 2301
• Professor: Michael Tannebaum

Document Summary

Significance: a term that indicates certainty that a relationship exists between variables or a difference exists between groups (significance is represented by the letter p). Independent sample t test: a t test determines whether an independent variable has an effect on a dependent variable, t tests compare the means of the two independent groups. Independence of observations: each respondent van only be in one group: t tests determine whether the difference between two groups is: Not due to chance: significance is represented by the letter p. The equation for the t test is as below: The null hypothesis being accepted means that there is no difference in the means of the two groups.