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Practicing Precaution

Practicing Precaution. Exploratory Data Analysis On Case Study Data Questionnaire Andre Dabrowski March 8 2005. Background. More a pilot study than a classical designed survey. Used either true/false or a 7-point numeric scale.

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Practicing Precaution

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  1. Practicing Precaution Exploratory Data Analysis On Case Study Data Questionnaire Andre Dabrowski March 8 2005

  2. Background • More a pilot study than a classical designed survey. • Used either true/false or a 7-point numeric scale. • Unlike many social surveys, the questions are “uni-directional”. • 5 “Parts” addressing separate aspects of interest • Each Part contained several questions on its theme • A document database was established to record the rater’s assessments of key source documents. • The goal is to distinguish cases and identify interesting features.

  3. Issues • Each case study evaluated by a separate team of raters. The confounding of a rater effect with case effect was unavoidable • Changes to the original measurement plans introduced . • Introduce a 0 entry to (1-7) scale indicating “unknown,” • “2” code in true/false (yes/no) responses for “unknown” • Now a mixture of qualitative and quantitative measurements • Assume “0” sits at the left-hand end of the 1-7 scale, and “2” is recoded as “0” (false/no). • Significant number of questions with missing data or for which all the case studies provided identical responses. • These questions had to be deleted.

  4. I2c I2d I3b I4a I4e • II2a II2b II3 II4a II4b II4c II4d • III2b III3a III3e III4b III7a III7b III8c III8f III8g III8h III8i III8j III9a III9c III9f III9g III9h III9i III9j III10b III10c III10e III10f III10g III10h III10i III10j III13a • IV1 IV2_1a IV2_1b IV2_2a IV2_2b IV2_2c IV2_2eb IV5b IV7a IV7b IV8a IV8d IV9b IV9c IV9d • V5b V6a V6b V10a V10b V14a V14b V14c V14d V14e V14f V19 V20 V21a V21b V21c V21d V22V23a V23c V24b V24c • Questions suppressed from the database due to missing data or constant response across cases.

  5. Questions with constant response across cases.

  6. Goal: Comparing the cases to each other.

  7. Goal: Identify interesting features.

  8. Goal: Identify interesting features.

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