topic Re: Type 1 and 2 error in a design in Discussions

Type 1 and 2 error in a design

billi — Thu, 02 Jan 2020 18:22:47 GMT

Is there any calculation to understand and reduce Type I and II errors in a design?

Re: Type 1 and 2 error in a design

Mark_Bailey — Thu, 02 Jan 2020 21:11:33 GMT

I assume that by "design" you are referring to one of the JMP design platforms such as Custom Design. These platforms provide Power Analysis outline within the Design Evaluation outline. You have to click Make Design first before evaluating it.

You might find this related discussion helpful. But please return if you still have more questions!

Re: Type 1 and 2 error in a design

billi — Fri, 03 Jan 2020 15:46:23 GMT

@Mark_Bailey Yes, I am working with full factorial design. Just one more question, alpha is set to 0.05 by default or do I need to set it by going into preferences?

Re: Type 1 and 2 error in a design

Mark_Bailey — Fri, 03 Jan 2020 16:40:25 GMT

If you mean to ask how to set alpha for the power analysis to your desired value, the box in the Power Analysis outline is editable.

The Full Factorial Design platform does not provide the Design Evaluation outline. In your case, click Make Table, then click the green triangle next to Evaluate Design table script. You will find the Power Analysis outline there.

If you are evaluating several candidate designs, proceed to make the data table for each one and then select DOE > Design Diagnostics > Compare Designs. This analysis platform provides a side-by-side comparison of the candidates, including their power.

Re: Type 1 and 2 error in a design

billi — Fri, 03 Jan 2020 17:31:24 GMT

@Mark_Bailey Thank you this helps.