Conduct a lack of fit test

minitab logoMinitab Procedure

  1. Select Stat >> Regression >> Regression ...  >> Fit Regression Model ... 
  2. Specify the response and the predictor(s).
  3. Minitab automatically recognizes replicates of data and produces Lack of Fit test with Pure error by default.
  4. Select OK. The output will appear in the session window.


The data set bluegills.txt contains the lengths (in mm) and ages (in years) of n = 78 bluegill fish. Is there sufficient evidence to conclude that there is lack of linear fit between y = length and x = age of bluegill fish?

Minitab dialog box

Minitab 17 regression dialog box

Sample output

minitab output

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