Here’s how you run Grubbs or Dixon’s outlier test in Minitab.
Go to Stat, Outlier test,
Under options choose the test you wish to do.
Be careful when you choose a outlier test method.
Minitab suggests that if you don’t know whether your data include outliers, use the Grubbs’ test.
There are options for Dixon’s test or Grubb’s…[Read more]
Let’s start with the following model:
response = function of (A,B,C,D,AB,AC,AD,BC,BD,CD,ABC,ABD,BCD)
If one did a stepwise regression model of all these variables, then one could see the AIC differences between models. It would be interesting to see if there was the model with (A,B,C,D, AB AD, ABC) had a lower AIC than the model with (A, B, C, D,…[Read more]