PSYC 2040 Chapter 2: Chapter 2.docx

• School: University of Guelph
• Department: Psychology
• Course: PSYC 2040
• Professor: David Stanley

Document Summary

The t test and comparisons of independent means: when a t test is performed to compare two independent means and it is found that the two sample variances are themselves more variable than reasonably can be attribute to chance, compute the estimate of the degrees of freedom, when comparing 2 independent samples, one uses a slightly different equation and estimates of degrees of freedom depending upon whether or not the population variances can be considered homogeneous. One and two tailed tests: null hypothesis, ho: u1=u2, alternative hypothesis, ho: u1 /= u2, one tailed, h1: u1< or > u2.