topic Re: How to output probability value from Life Distribution? in Discussions

How to output probability value from Life Distribution?

YK-Chang — Thu, 08 Jun 2023 16:35:52 GMT

Hi,

I did some reliability fitting by Life Distribution in Reliability and Survival, and I would like to output probability value from Life Distribution. Anyone knows?

Re: How to output probability value from Life Distribution?

Jed_Campbell — Wed, 15 Feb 2023 16:58:40 GMT

Could you clarify which probability value you are looking for, and which format you are looking for the output to be in (HTML, a new data table, etc.)? Also, via scripting, via GUI? Any extra details can help. Thanks!

Re: How to output probability value from Life Distribution?

YK-Chang — Thu, 16 Feb 2023 10:00:21 GMT

Hi,

Thanks for your reply!

most of my cases are based on Weibull distribution. I would like to output the Weibull distribution probability of every point (i.e. Probability value of Time cycle from your plot) to the new data column via GUI.

Re: How to output probability value from Life Distribution?

Jed_Campbell — Thu, 16 Feb 2023 14:57:09 GMT

To output the distribution probability for every point, select the Red Triangle near "Parametric Estimate - Weibull" (or other distribution), then "Save Probability Estimates." This makes 3 new formula columns in the data table (the estimate and the upper & lower confidence limits).

Re: How to output probability value from Life Distribution?

YK-Chang — Wed, 22 Feb 2023 07:25:58 GMT

Hi, it seemed this way can only output the probability estimates. If I would like to output the probability of the rawdata, not prbability extracted from the fitted line. Is there any quick way to output from GUI?

many thanks!

Re: How to output probability value from Life Distribution?

Jed_Campbell — Wed, 22 Feb 2023 16:02:26 GMT

I'm not certain I'm following what you're looking for, but the method I showed previously does rely on assuming that a Weibull distribution (or whichever distribution you choose) fits the data. If you want a distribution-free output of the probability, this can be done in the Tabulate platform, using the Cumulative Probability formula in JMP. I've attached a sample data table with the script for this saved to the table.

Re: How to output probability value from Life Distribution?

Mark_Bailey — Wed, 22 Feb 2023 16:54:54 GMT

Do you want the probabilities from the empirical cumulative distribution function? If so, you can get them from Distribution. Here is the CDF Plot in Distribution:

Click the red triangle next to Weight and select Save > Prob Scores. A new column appears in the data table:

I confirm the empirical CDF by plot the new scores against the original variable, Weight: