Pre-recorded Instructional Chats

Page Index

1. Explanation for these recorded Chats

2. Course Calendar and Instruction Chats

3. Chat Notes and Recorded Chat Videos

1. Explanation for these recorded Chats

In previous sections of this course I held live chat sessions that provided some instruction to highlight what I viewed as important concepts for the topic of that week. Few students attended these chat sessions, but a number did find the Chat Notes to be valuable for test preparation.

These live instructional chats are no longer held due to low attendance/interest, but I  post below Chat Notes and recorded videos of chat sessions held during the last semester these chats were offered.

The video of these chats have been edited to save time, but all content of the chats is included.

Since the Chat Notes represent highlights of content found in the Instructional Videos (found one the main course webpage), students often find these Chat Notes and videos to be good summaries in preparation for course tests.

2. Course Calendar and Instructional Chats

Below is an overview of which Chat Notes and Instructional Chat Videos correspond to semester weeks.

3. Chat Notes and Recorded Chat Videos

Chat Notes are MS Word documents. If you are unable to open these, please let me know and I will convert them to PDF.

1. Chat Notes 1 - Descriptive and Inferential Statistics  

Chat 1 covers Course Notes 1 Descriptive Statistics through section 5.

Chat 1 Videos

• Course Introduction (Time = 20:26): Course Introduction, Chats, Notes, Syllabus, Renting SPSS software, Course Calendar, Test formats, Sample Tests, APA Style documents, Practice Exercises, Course Notes and Instructional Videos, SPSS Tutorials, Table entitled "Statistical Procedures and Their Characteristics," Grades and Testing; Alternate Tests, Attendance Policy and Chat Sessions, Class Withdrawal, Disability Accommodations  
• Section 1.1 (Time = 10:55): Descriptive and Inferential Statistics
• Section 1.2 (Time =  4:11): Variables 
• Section 1.3 and 1.4 (Time =  9:41): Measurement and Scales of Measurement  
• Section 1.5 (Time = 13:57): Types of Variables (IV, DV, Qualitative, Quantitative)

2. Chat Notes 2 - Hypotheses 

Chat 2 covers Course Notes 1 Descriptive Statistics from sections 6 to 11

Chat 2 Videos

• Section 1.6 (Time =  4:12): Hypotheses - General Format 
• Section 1.6 (Time =  8:15): Hypotheses - Common Mistakes   
• Section 1.6 (Time =  7:02): Hypotheses - Practice Writing with Qualitative IV 
• Section 1.6 (Time =  7:00): Hypotheses - Practice Writing with Quantitative IV 
• Section 1.7 (Time =  3:10): Central Tendency
• Section 1.8 (Time =  3:16): Sampling Error vs. Bias
• Section 1.9 (Time =  6:36): Variability 
• Section 1.10 (Time =  5:52): Frequencies  
• Section 1.10 (Time =  6:41): Percentile Rank (from Frequencies)
• Section 1.11 (Time =  5:49): Boxplots 

3. Chat Notes 3 - Normal Distribution and Standard Scores

Chat 3 cover Course Notes 2 Normal Distribution and Standard Scores

Chat 3 Videos

• Section 2.1 (Time = 3:44): Standard Scores - The Z Score   
• Section 2.2 (Time =13:55): Area Under and Above a Z Score (assuming normal distribution) 
  • Z Table referenced in video above can be found here: Z table (left side probabilities)
• Section 2.2 (Time = 2:38): Normal Distribution Graphic with Percentile, Z, NCE, etc. 
• Section 2.2 (Time = 4:08): Area between two Z scores 
• Section 2.3 (Time = 4:37): Percentile Ranks 
• Section 2.4 (Time = 3:28): Convert from Z to X 

4. Chat Notes 4 - Statistical Inference: Testing Hypotheses   

Chat 4 covers Course Notes 3 Statistical Inference

Chat 4 Videos  

• Section 3.1 and 3.2 (Time =  6:07): Statistical Inference, Population vs. Sample  
• Section 3.3 (Time =  1:37): Randomness and Sampling    
• Section 3.4 (Time =  2:34): Point and Interval Estimates    
• Section 3.5 (Time = 10:29): Population, Sample, and Sampling Distributions  
• Section 3.6 (Time =  5:55): Sampling Distribution of the Sample Mean (this video should be watched after first watching the above video, section 3.5)   
• Section 3.7 (Time =13:09): Central Limit Theorem    
• Section 3.8 (Time =  6:15): Confidence Intervals    
• Section 3.8 (Time =  9:37): Confidence Intervals - Example 1with a 95% confidence and Example 2 with 99% confidence interval  
• Section 3.9 (Time =  2:49): Margin of Error and Chat Recap 

5. Chat Notes 5 - Hypothesis Testing with One-sample Z test

Chat 5 covers Course Notes 4 Hypothesis Testing with One-sample Z test

Chat 5 Videos

• Section 4.1 (Time =  4:25): Hypothesis Testing Logic Summarized 
• Section 4.2 (Time =  5:52): One Sample Z test with p-values: Null and Alternative Hypotheses      
• Section 4.2 (Time =  5:17): One Sample Z test with p-values:  Formula for Z test value 
• Section 4.2 (Time =  6:08): One Sample Z test with p-values: Finding p-values for Z test 
  • Z Table referenced in video above can be found here: Z table (left side probabilities)
• Section 4.2 (Time =  6:57): One Sample Z test with p-values: Compare p against alpha (also shows significance vs. non-significance in hypothesis testing decisions)
• Section 4.2 (Time =  4:22): Second Example of Z test performed  
• Section 4.3 (Time =  8:15): One Sample Z-test with Critical Z Values 
• Section 4.5 (Time =  7:52): Errors in Hypothesis Testing: Type 1 and 2 errors, Power, Table of Hypothesis Testing Results 
• Section 4.5 (Time =  3:53): Errors in Hypothesis Testing: Example 1  
• Section 4.5 (Time =  1:27): Errors in Hypothesis Testing: Example 2 
• Section 4.5 (Time =  1:06): Errors in Hypothesis Testing: Example 3
• Section 4.5 (Time =  0:55): Errors in Hypothesis Testing: Example 4

6. Chat Notes 6 - Notes 5a and 5b One sample and Two sample t-tests   

Chat 6 covers Course Notes 5a One-sample t-test

Chat 6 Videos

One-sample t-test

• Section 5a.1 (Time =  4:14): One sample t test worked example - Calculated in Excel   
• Section 5a.1 (Time =  6:07): One sample t test worked example - Calculated in SPSS 
• Section 5a.1 (Time =  1:00): One sample t test worked example - Interpretation of Results 
• Section 5a.1 (Time = 10:04): One sample t test worked example - APA Style    
• Section 5a.1 (Time = 12:39): One sample t test worked example - Confidence Interval around Sample Mean     
• Section 5a.1 (Time =  2:18): One sample t test worked example - Confidence Interval around Sample Mean with SPSS  
• Section 5a.1 (Time =  6:45): One sample t test worked example - Confidence Interval around Sample Mean Difference 
• Section 5a.1 (Time =  1:27): One sample t test worked example - Confidence Interval around Sample Mean Difference with SPSS 
• Section 5a.1 (Time =  1:32): One sample t test worked example - Confidence Interval around Sample Mean Difference -- Hypothesis Testing   

APA Style

•  Comment on APA Style and Tests (Time =  1:54) 

Two-samples t-test

• Section 5b.2 (Time =  5:52): Two-samples t test worked example - Calculated in SPSS  
• Section 5b.2 (Time =  3:27): Two-samples t test worked example - SPSS Results, Equal vs. Unequal Variances
• Section 5b.2 (Time =  1:37): Two-samples t test worked example - Null Hypothesis 
• Section 5b.2 (Time =  2:10): Two-samples t test worked example - Reject or Fail to Reject Null with p-values 
• Section 5b.2 (Time =  3:21): Two-samples t test worked example - Reject or Fail to Reject Null with Confidence Intervals  
• Section 5b.2 (Time =  6:02): Two-samples t test worked example - Reading APA Style Table  
• Section 5b.2 (Time =  3:45): Two-samples t test worked example - Creating APA Style for current example
• Section 5b.2 (Time =  1:54): Two-samples t test worked example - Using Confidence Intervals for Hypothesis Testing and Finding 99% CI with SPSS     

7. Chat Notes 7 - Notes 5c and 6 t-test and Pearson r    

Correlated-samples (also called Paired-samples) t-test

• Section 5c.1 (Time = 7:09): Correlated Samples t-test - Example with SPSS  
• Section 5c.1 (Time = 9:52): Correlated Samples t-test - Example APA Style with alpha = .01 
• Section 5c.1 (Time = 6:16): Chat 7 Notes 5c.1 Correlated Samples t-test - Example APA Style with alpha = .05 

Pearson Correlation Coefficient, r

• Notes 6 (Time = 2:31): Pearson Correlation Coefficient r - Difference from Correlated-samples t-test 
• Notes 6 (Time = 4:17): Pearson Correlation Coefficient r - General Interpretations  
• Notes 6 (Time = 4:40): Pearson Correlation Coefficient r - Loading SAT data file in SPSS and Making Predictions  
  • SAT data used above can be downloaded here: http://www.bwgriffin.com/gsu/courses/edur8132/tests/math_sat.sav     
• Notes 6 (Time = 2:10): Pearson Correlation Coefficient r - Calculating Correlations with SPSS 
• Notes 6 (Time =15:15): Pearson Correlation Coefficient r - Interpretation of SPSS Output 
• Notes 6 (Time = 4:44): Pearson Correlation Coefficient r - Reading APA Style Correlation Table 
• Notes 6 (Time = 5:21): Pearson Correlation Coefficient r - APA Style Presentation of SAT Data

8. Chat Notes 8 - Notes 7a and 7b Chi square Tests and Which Statistical Test to Use 

Correlation continued -- null and alternative hypotheses

• Notes 6 (Time =  1:08): Correlation Null Hypothesis  

Chi-square Goodness-of-fit

• Section 7a.1 (Time = 3:49): Chi-square Goodness of Fit - Example 1 Expected Counts or Probabilities  
• Section 7a.1 (Time = 3:48): Chi-square Goodness of Fit - Example 1 Calculations Web Page Calculator with VassarStats.net 
  • Link to Vassar Stats Goodness-of-fit page: http://vassarstats.net/newcs.html 
• Section 7a.1 (Time = 1:06): Chi-square Goodness of Fit - Example 1 Calculations Web Page Calculator with Quantpsy  
  • Link to Quantpsy Goodness-of-fit page: http://www.quantpsy.org/chisq/chisq.htm 
• Section 7a.1 (Time = 2:01): Chi-square Goodness of Fit - Example 1 Hypothesis Testing Decision Rule   
• Section 7a.1 (Time = 3:22): Chi-square Goodness of Fit - APA Style 
• Section 7a.1 (Time = 8:57): Chi-square Goodness of Fit - Example 2 With Unequal Expected Counts  
• Section 7a.1 (Time = 5:00): Chi-square Goodness of Fit - Example 3

Chi-square Test of Association

• Section 7b.2 (Time = 7:30): Chi-square Test of Association - Example 1 Entering Data  
  • Link to Vassar Stats Test of Association: http://vassarstats.net/newcs.html 
  • Link to Quant Psy Test of Association: http://www.quantpsy.org/chisq/chisq.htm 
• Section 7b.2 (Time = 7:02): Chi-square Test of Association - Example 1 Null and Alternative Hypotheses 
• Section 7b.2 (Time = 4:48): Chi-square Test of Association - Example 1 APA Style 

Which Statistical Test to Use?

• Which Statistical Test (Time = 5:46): Review - Table of Statistical Tests 
  • Table of Statistical Tests: http://www.bwgriffin.com/gsu/courses/edur8131/content/WhichStatisticalTestToUse.pdf 
• Which Statistical Test (Time = 8:11): Review - Practice with Sample Test 2     

9. Chat Notes 9 - Notes 8a Regression  

10. Chat Notes 10 - Notes 8b Multiple Regression 

11. Chat Notes 11 - Notes 8b Multiple Regression part 2 

12. Chat Notes 12 - Notes 9a ANOVA 

13. Chat Notes 13 - Notes 9a ANOVA part 2  

14. Chat Notes 14 - Notes 9d ANCOVA  

15. Chat Notes 15 - Notes 9d ANCOVA part 2