• Question:

  Is a factor significant?

• Definition:

  Vertical Axis: Response Variable

  Horizontal Axis: Factor

• Interpretation/Conclusion:

  The factor is significant wrt location

  The factor is significant wrt variation

  The factor is significant

• NIST/SEMATECH Handbook Chapter:

  1. Exploratory Data Analysis

  5. Process Improvement

• Reference:

  John Tukey (1977), Exploratory Data Analysis, Addison-Wesley.

Dataplot Code:

SKIP 25

READ PBF11.DAT YEAR DAY J1 J2 J3 J4 Y

LET MONTH = INT(DAY/31) + 1

CHARACTERS BOX PLOT

LINES BOX PLOT

XLIMITS 1 12

BOX PLOT Y MONTH

Dataplot Reference Manual Documentation for BOX PLOT

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