Analysing DoE experiment with center points
For JASP, the coefficient for center points will not be calculated and its corresponding p-value. This will affect the decision make add or drop terms as the standard error will be affected. I did a comparison with another software using the same dataset and found this difference. Any recommendations on how I should approach using JASP so that I will be able to make proper conclusion based on the data.
Comments
I'll bring this to the attention of our expert.
I assume this concerns a DoE analysis? Would you mind sharing an example analysis? Ideally a JASP file and screenshots of the output you get from other software?
I had tried to replicate how the other software handles the center point group by adding another column manually. It is difficult to explain in text here, see attached.
With reference to the attached, is it possible to auto add a column to identify center points as a block when the design is created by JASP, and with name "Center Points"? I had tried to use the auto generated standard run for block, but it does not work.
Is it possible to auto generate the mid-point values (center points), so that we can reduce manual calculation as much as possible?
I am not sure on how to add axial points to the existing design in JASP to convert it into RSM design. In JMP, you can do it with "Augment Design" and in Minitab, you can "Modify design". I am new to JASP and have to manually add and calculate the axial distance. It will be great if these can be automated.
If I am using JASP incorrectly, do let me know the right approach. Thanks.