topic Re: Test Probabilities in Distribution Platform...version 15 change? in Discussions

Test Probabilities in Distribution Platform...version 15 change?

sfigard — Sat, 10 Jun 2023 20:38:52 GMT

When testing probability distributions in the distribution platform (to do a one-way chi-square test), you used to be able to enter any number in the hypothesized probability column and JMP would recalculate to adjust the sum to equal one. This was very helpful since if, for example, I had a ratio set of 9:3:3:1, I could enter 9, 3, 3, 1 and JMP would do the correct math. Now, anytime I enter a number that's not between 0 and 1, I get an error message that these entries have to be between 0 and 1 even though it still suggests it can "rescale" the input probabilities. Am I doing something wrong or is this a "feature" and not a "bug"?

Given that I use this to teach my students about chi-square testing, it is really not helpful to tell them that now they have to do the math.

Re: Test Probabilities in Distribution Platform...version 15 change?

tonya_mauldin — Tue, 08 Sep 2020 12:46:08 GMT

This change was made as a fix to another issue with Test Probabilities. We will investigate other fixes and see if we can add this functionality back.

Re: Test Probabilities in Distribution Platform...version 15 change?

Dan_Obermiller — Tue, 08 Sep 2020 14:12:26 GMT

In the meantime, the students won't really need to do that much math. In your example of 9:3:3:1, the total is 16. So in the text entry box for the probability type "=9/16", "=3/16", "=3/16", and "=1/16" (without the double-quotes). JMP will do the division for you.

Re: Test Probabilities in Distribution Platform...version 15 change?

sfigard — Tue, 08 Sep 2020 14:03:25 GMT

Thanks for the quick response. It will be helpful to have this functionality back, but Dan's solution below will work well until then.

Re: Test Probabilities in Distribution Platform...version 15 change?

sfigard — Tue, 08 Sep 2020 14:04:02 GMT

Thank you so much for this solution. It will work for my students...and me.

Re: Test Probabilities in Distribution Platform...version 15 change?

Audrey_Shull — Thu, 08 Apr 2021 15:10:13 GMT

Greetings - i can confirm that as of JMP 16 (which is currently available), the original functionality has been added back in. You are now able to again enter probabilities greater than 1 and JMP will rescale.

Re: Test Probabilities in Distribution Platform...version 15 change?

sfigard — Thu, 08 Apr 2021 17:14:44 GMT

Excellent! Thank you! Both my students and I thank you.

Re: Test Probabilities in Distribution Platform...version 15 change?

sfigard — Wed, 15 Sep 2021 18:30:25 GMT

I am preparing my lessons on the chi-square test for this semester using JMP 16, and again, I can't tell you how relieved I am that the probabilities can be automatically rescaled with using the one-way chi-square test in the distribution platform. Thank you again so much, and thank whatever team members or member did the actual recode to "correct this feature" from JMP 15.