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 Question: Does the primary factor (X1) have an effect? What is the optimal level of the primary factor? Definition: Vertical Axis : Response Horizontal Axis: Nuisance (secondary) factors (X2, X3, X4) Plot character : Primary factor (X1) Interpretation/Conclusion: Factor 1 (X1) is statistically significant The optimal setting for factor 1 is X1 = 2 There is no interaction between X1 and the 3 nuisance factors There exist 2 outlying (X2,X3,X4) conditions:     (X2,X3,X4) = (1,1,2) and (2,2,1) NIST/SEMATECH Handbook Chapter: 1. Exploratory Data Analysis 5. Process Improvement Reference: Filliben Dataplot Command: BLOCK PLOT Y     X2 X3 X4     X1 Dataplot Code: SKIP 25 READ SHEESLE2.DAT Y X1 X2 X3 X4 CHARACTERS 1 2 LINES BLANK BLANK BLOCK PLOT Y X2 X3 X4 X1 Dataplot Reference Manual Documentation for BLOCK PLOT NIST is an agency of the U.S. Commerce Department. Date created: 06/05/2001 Last updated: 09/28/2016 Please email comments on this WWW page to alan.heckert@nist.gov.