Week one discussion qr

1. What is most important to determine when understanding missing data? 
2. What are the advantages and disadvantages of common missing data methods? 
3. When might one use as a threshold or guideline in terms of when missing data be estimated vs.

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Osborne & Overbay (2004). The power of outliers (and why researchers should ALWAYS check for them. Practical Assessment, Research & Evaluation, 9 (6), 1-8.