EDUR 8131
Educational Statistics 1

Notes 5a: One-sample t-test
Notes 5b: Independent Samples t-test

(1) Summary Presentation

• Document: One Sample and Two Sample t-test Word
• Document: One Sample and Two Sample t-test PDF
• Video: One Sample and Two Sample t-test (50 minutes) with captions One and Two Samples t-test

(2) Reporting statistical results in APA style (Word Documents so you can copy and paste tables)

• One-sample t-test   
• Two-independent samples t-test 

(3) JASP Software

• One Sample t-test (Summary Presentation Notes 5a; with captions One Sample t-test)
• Two Samples t-test (Summary Presentation Notes 5b; with captions Two Samples t-test)

(4) Exercises

One Sample, Two Samples, and Correlated t-tests (with answers)

(5) Detailed Presentation 

Notes 5a: One-sample t-test

• Read: Notes 5a One Sample t-test 
• Read: Moore et al text chapter 7.
• Critical t-values table: t-tables.pdf  
• Watch and Read: Instructional Videos and Related Materials
  • Section 1 to 4: Purpose, Hypothesis Testing Steps, Formula, and Hypotheses   
  • Section 5: Alpha, Degrees of Freedom, and Critical Values   
  • Section 6: Decision Rules for Hypothesis Testing 
  • Section 7: Example 1 with SPSS Illustration  
  • Section 7: Example 2 with SPSS Illustration  
  • Section 7: Example 3 with Excel Calculation from Descriptive Statistics 
  • Section 8a: Confidence Interval about a Sample Mean with SPSS Illustration (SPSS starts 9:52 in video)  
  • Section 8b: Confidence Interval about Mean Difference with SPSS Illustration (SPSS starts at 13:08 in video)  
  • Section 9: Confidence Intervals for Hypothesis Testing   
  • Section 10: Assumptions of One-sample t-test   
  • Section 11a: APA Style Presentation as Text (with SPSS illustration)  
  • Section 11b: APA Style Presentation as Table with Text  (preferred presentation style)
• Supplemental Excel File: One Sample t-test   

Notes 5b: Independent Samples t-test

• Read: Notes 5b Independent Samples t-test
• Read: Moore et al text chapter 7.
• Critical t-values table: t-tables.pdf  
• 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