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Statistics Working Group Documents


  1. Instructions for authors of the Report
  2. Analysis design
  3. Hypothesis tests
  4. Interval estimation
  5. Point Estimation
  6. Graphic presentation of multivariate data

  1. How to edit the report
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This section is concerned with analysis design, including optimization and treatment of bias.
  1. Blind Analysis in Particle Physics (Aaron Roodman, PHYSTAT2003) [PDF]
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This section is concerned with testing hypotheses, including goodness-of-fit, signal significance, and internal consistency of data.
  1. On Multivariate Goodness-of-Fit and Two-Sample Testing (Jerome Friedman, PHYSTAT2003) [PDF]
  2. Pitfalls of Goodness-of-Fit from Likelihood (Joel Heinrich, PHYSTAT2003) [PDF]
  3. The End of Chi-Squares and a New Era in Goodness of Fit Tests (Ilya Narsky, seminar) [PDF]
  4. Goodness of Fit: What Do We Really Want to Know? (Ilya Narsky, PHYSTAT2003) [PDF]
  5. Likelihood Ratio Test and Signal Significance Test (Ilya Narsky) [PS]
  6. Repeat Consistency of a Result (Frank Porter) [PDF]
  7. The Simple Hypothesis Test (Frank Porter) [PDF]
  8. Statistical error on measurement shifts (Art Snyder) [BAD note]
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This section is concerned with estimating intervals such as confidence intervals and Bayes intervals.
  1. Asymmetric Errors (Roger Barlow, PHYSTAT2003) [PDF]
  2. Comment on use of "CLS" method (Frank Porter) [hn posting]
  3. Interval Estimation Using the Likelihood Function (Frank Porter) [PS]
  4. Frequentist interval construction by Feldman and Cousins [physics archive entry] Note: this method is not recommended by the BaBar SWG Report.
  5. Errors on Small Numbers [Web Page]
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This section is concerned with estimation of "best" values for parameters.
  1. Low Statistics Likelihood Fits are Tricky (Frank Porter) [PS]
  2. Pedagogical notes on maximum likelihood method [PS]; Deviations from Gaussian behavior for low N. Not for the faint of heart [PS] (two notes from Bob Cahn)
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  1. Recommendations for Display of Projections in Multi-Dimensional Analyses (SWiG) [PDF]
  2. sPlots (Muriel Pivk and Francois Le Diberder) [NIM paper][BAD note][PDF talk]
  3. How sPlots are Best (Robert Cahn) [PDF]
  4. Simple sPlots example (Robert Cahn) [PS]
  5. Horizontal placement of points for measurements within wide bins (George Lafferty) [PDF talk][Paper]
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SWG convenors: Roger Barlow and Ilya Narsky
Last modified: Wed Jan 11 14:31:39 PST 2006