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Sample PPCC plot

  • Question:
    Best-fit member within a distributional family?

  • Definition:
    Vertical Axis: Probability plot correlation coefficient
    Horizontal Axis: Family tail or shape parameter

  • Interpretation/Conclusion:
    Best-fit symmetric distribution is near-normal
    Data is not long-tailed
    Sample median would be a poor estimator of location

  • NIST/SEMATECH Handbook Chapter:
    1. Exploratory Data Analysis

  • Reference:
    Filliben (1975), "The Probability Plot Correlation Coefficient Test for Normality," Technometrics, Vol. 17, No. 1.

Dataplot Command: PPCC PLOT Y
Dataplot Code:
SKIP 25
READ XXX.DAT Y
PPCC PLOT Y

Dataplot Reference Manual Documentation for PPCC PLOT


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Date created: 06/05/2001
Last updated: 09/30/2016

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