08: Evaluating Search Engines 8. 1 Why Evaluate 8.2 The Evaluation Corpus 8.3 Logging + 8.4 Effectiveness Metrics(+) 8.5 Efficiency Metrics 8.6 Training, Testing, and statistics +) 8.7 The bottom Line skip) 3/N08: Evaluating Search Engines 8.1 Why Evaluate 8.2 The Evaluation Corpus 8.3 Logging (+) 8.4 Effectiveness Metrics (+) 8.5 Efficiency Metrics 8.6 Training, Testing, and Statistics (+) 8.7 The Bottom Line (skip) 3/N