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Cristian Vava, PhD, MBA
  • Male
  • North Wales, PA
  • United States
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Cristian Vava, PhD, MBA commented on Dr. Justin Washtell's blog post Trust The Algorithms, Not The Data.
"Justin, Your advice is very pertinent and I hope most practitioners will follow it. Below are my 2 cents for a Friday evening... Not very sure how you’ll be able to get a good measure of the data quality even of a selected set without fully…"
Nov 21, 2014
Cristian Vava, PhD, MBA replied to R.Anbumathi Vishnu prasanna's discussion sample size for pilot and main study
"The sample size depends on so many things that even preparing a comprehensive list is a difficult task.   These are the stages of knowledge based on what you know / don’t know (assuming you have a clear understanding of what your…"
Jul 8, 2013
Cristian Vava, PhD, MBA commented on Vincent Granville's blog post Data science defeats intuition: twin data points is the norm, not the exception
"@Vincent: The naïve intuition may suggest that an expected arrangement for stars would have them almost equally spaced. In reality, assuming the stars are perfect points (reducing their size and mass to zero thus eliminating all connections to…"
Jul 2, 2013
Cristian Vava, PhD, MBA replied to Sharath Dandamudi's discussion Difference between Reporting (MIS),Analytics and Advanced Analytics
"  When data under analysis is known the processing is called Descriptive Analytics. Known data is the recorded history. There are many techniques to do this type of analytics but besides of graphic depiction, filtering, decomposition, and…"
Feb 20, 2011
Cristian Vava, PhD, MBA replied to Vincent Granville's discussion AnalyticBridge competition: investigate the spectacular stock market collapse of May 6, 2010 in the group Data Mining Competitions
"What you are asking the participants to do is to build a model and then explain what may have happened in a time interval of about one hour. Participants could gather knowledge by taking individual samples of some parameters (you suggested volume,…"
Jul 2, 2010

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Field of Expertise:
Business Analytics, Predictive Modeling, Biostatistics, Marketing Databases, Operations Research, Econometrics, Vizualization, Artificial Intelligence, Other
Years of Experience in Analytical Role:
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Technical, Executive Management, Consultant
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