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Lecture Notes for STAT 4705 - Statistics for Engr at Virginia Tech (VT)

Notes Information

Material Type:CribSheet
Professor:Staff
Class:STAT 4705 - Statistics for Engr
Subject:Statistics
University:Virginia Polytechnic Institute And State University
Term:Fall 2008
Keywords:
  • Engineering Method
  • Middle Value
  • Interaction Effect
  • Combination
  • Variability
  • Convenience
  • Experimental Unit
  • Retrospective Study
  • Such Factors
  • Time Effects
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Sample Document Text

Engineering method: 1. Define problem. 2. Postulate important factors of influence. 3. Formulate a working model. 4. Collect data, conduct experiment. 5. Estimate working model. 6. Determine important factors and test model. 7. Revise working model. 8. Collect data. 9. Repeat if no solution Probabilistic or statistical model: introduces a random error. Populations- set of all possible observations of interest to the problem at hand Data collection issues: 1. Fundamental purpose for collecting data 2. Characteristic/s of interest 3. Presumed engineering model 4. Parameters of interest to study 5. Physical constraints on data Methods of Collecting Data: 1. Retrospective study – adv. low cost. Disad. Not have info required. Missing data.Not able to document interesting phenomena. 2. Observational study – interact with study only as much as required to get relevant data. Easy to get, data sometimes missing, some usefulness, limited control3. Designed experiment- intentionally disturbthe process and then obser...

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