The art and science of mathematical investigation begins with asking, “What kind of data do I have? “, then “How do I re-represent these raw numbers into something more meaningful?” Datum refers to a single metric, usually a number while data are a collection of numbers and alpha-numerics. Before selecting a tool and building models, the investigator needs to create an extended database from which to calculate their models. Preliminary questions include:
·Is it static (such as a one-time survey) or dynamic (periodic refreshes) data
·Do they exist as a single table or spread across several tables
·If they do exist across several tables, what is the hierarchy of each table?
This chapter addresses several issues and provides many different examples of creating-transforming raw variables into potential quantitative indicators and metric’s.
This chapter will show how to:
·Use streaming data for nuclear and physiological investigations,
·Create unique time-dependent hierarchies from flat data,
·Transform simple counting statistics to increase the number of new variables,
·Constrict confidence intervals with additional transformed variables,
·Create complex physiological ratios to predict heart failure in children,
·Use demo/geographic/transaction data that define high valued clients,
·Calculate financial filters to identify n-period ahead closing stock prices,
·Create “Discovery Paths” within a website that reconfigures with SEO,
·Capture meaningful metric’s from NCSA raw web logs,
·Use “relativistic coding” in time series analysis,
·Aggregate the dynamic quality of streaming data to create new variables
·Quantify text-mining from organic keyword searches on the web,
·Define “high-valued” or “target” segments
·Re-aggregate the hierarchy of data into meaningful segments
·Create dimensions for CRM based upon simple sign-in data
·Look at data and their transformations in new and different way
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