Independent Samples t-test
Reading Material
Read:
Notes 5b Independent Samples t-test
Reporting t-test Results in APA Style:
Two-independent samples t-test
(Word doc)
Examples of Published t-test Results:
Hallam, Price, & Katsarou
2006, see Tables 1 and II, p. 115 (lacks *p<.05, t value)
Goodman, Hans, & Bernstein
2005, see Table 1, p. 555
Critical t-values table:
t-tables.pdf
Instructional Videos
Watch and Read: Instructional Videos and Related Materials
Excel File:
Two-group t-test and F-max Test
Sections 1 and 2:
Overview, Purpose, Steps in Hypothesis Testing
Sections 3 and 4:
Hypotheses and Decision Rules
Section 5:
t-test with Equal Variances -- Formula, Standard Error, and df
Section 6:
Finding Critical Values for t-test
Section 7:
Example 1 t-test with Equal Variances -- Formulas
Section 7:
Example 1 t-test with Equal Variances -- SPSS
Section 7:
Example 1 t-test with Equal Variances -- Excel
Section 7:
Example 2 t-test with Equal Variances -- Formulas and SPSS
(SPSS starts at about 5:45 in video)
Section 7:
Example 2 t-test with Equal Variances -- Excel
*Section 8:
Heterogeneity of Variances
Section 9:
Assessing Homogeneity of Variance -- Levene's Test
(SPSS)
Section 9:
Assessing Homogeneity of Variance -- F-max Test
Section 9:
Assessing Homogeneity of Variance -- F-max Test with Excel
Section 10:
t-test with Unequal Variances -- Formula, Standard Error, and df
Section 11:
Example 1 t-test with Unequal Variances -- SPSS and Excel
Section 11:
Example 2 t-test with Unequal Variances -- SPSS and Excel
Section 12:
Confidence Intervals - Example 1
(SPSS)
Section 12:
Confidence Intervals - Example 2
(SPSS)
*Section 13:
Equal vs. Unequal t-test - Comparison of Results
Section 14:
APA Style Presentation - t-test with Equal Variances
Section 14:
APA Style Presentation - t-test with Unequal Variances
Section 14:
APA Style Presentation - Multiple t-tests with same Group and Text Format