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Normal Probability Plot Top Prev Next
Sample normal probability plot

  • Question:
    Normal distribution?
    Outliers?

  • Definition:
    Vertical Axis: Ordered data
    Horizontal Axis: Order statistic medians from normal N(0,1) distribution

  • Interpretation/Conclusion:
    Data is normally distributed
    No outliers

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

  • Reference:
    Chambers, Cleveland, Kleiner, and Tukey (1983), Graphical Methods for Data Analysis, Wadsworth.

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

Dataplot Reference Manual Documentation for PROBABILITY PLOT


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Date created: 6/5/2001
Last updated: 10/30/2013

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