• Internal
• External
• Construct
• Statistical Conclusion
• Internal: Informative variable missing. Bring data from other sources
• External: The Fixation variable makes the result perfect. The model may not generalize
• Construct: Class imbalance affects the outcome badly
• Statistical Conclusion: Based on the statistical measure used, the conclusion can be incorrect.
Data Mining: Association: Support, Confidence, and Lift
Data Analytics, Machine Learning, Data Science