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Weibull Plot Top Prev Next
Sample Weibull plot

  • Question:
    Does data follow a 2-parameter Weibull distribution?
    What is best shape parameter for 2-parameter?
    What is best scale (= variation) parameter?
    Outliers?

  • Definition:
    Vertical Axis: Weibull cumulative probability
    Horizontal Axis: Log of ordered Response

  • Interpretation/Conclusion:
    Data follows a 2-parameter Weibull distribution
    Shape parameter is 33.318
    Scale parameter is 5.280
    no outliers

  • NIST/SEMATECH Handbook Chapter:
    1. Exploratory Data Analysis
    8. Assessing Product Reliability

  • Reference:
    Nelson (1982), Applied Lifetime Data Analysis, Addison-Wesley.

Dataplot Command: WEIBULL PLOT Y
Dataplot Code:
SKIP 25
READ FULLER2.DAT Y
WEIBULL PLOT Y
STATUS PARAMETERS

Dataplot Reference Manual Documentation for WEIBULL PLOT

Date created: 06/05/2001
Last updated: 02/13/2023
Please email comments on this WWW page to alan.heckert@nist.gov.