https://community.jmp.com/t5/Discussions/What-is-the-relation-between-Fit-Parametric-Survival-and-Fit/m-p/883004#M104732 <P>I am using Fit Parametric Survival with a weibull fit to several different groups of data (group 0 to group 19) with only location effect. Parallelly I am verifying the alpha values of the weibull fit to the different groups from Fit Life by X plot. I understand that in the Fit Parametric Survival plot, it takes the last group as the anchor point and calculates the intercept (not sure what exactly that means). But what I have figured out that the relationship between the estimates from the Fit Parametric Survival and Fit Life by X is as follows:&nbsp;</P> <PRE><CODE class=" language-jsl">estimate from Fit Life by X = exp(intercept + estimate from Fit Parametric Survival)</CODE></PRE> <P>I have verified this is true for all the groups except the last one i.e. group 19 as shown below. How do I get the alpha of the group 19 from the intercept and estimates of the Fit Parametric Survival table?</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Screenshot 2025-07-02 175018.png" style="width: 999px;"><img src="https://community.jmp.com/t5/image/serverpage/image-id/77744i001804510F88948A/image-size/large?v=v2&amp;px=999" role="button" title="Screenshot 2025-07-02 175018.png" alt="Screenshot 2025-07-02 175018.png" /></span></P> Thu, 03 Jul 2025 01:02:33 GMT FrequencyBison9 2025-07-03T01:02:33Z https://community.jmp.com/t5/Discussions/What-is-the-relation-between-Fit-Parametric-Survival-and-Fit/m-p/883004#M104732 <P>I am using Fit Parametric Survival with a weibull fit to several different groups of data (group 0 to group 19) with only location effect. Parallelly I am verifying the alpha values of the weibull fit to the different groups from Fit Life by X plot. I understand that in the Fit Parametric Survival plot, it takes the last group as the anchor point and calculates the intercept (not sure what exactly that means). But what I have figured out that the relationship between the estimates from the Fit Parametric Survival and Fit Life by X is as follows:&nbsp;</P> <PRE><CODE class=" language-jsl">estimate from Fit Life by X = exp(intercept + estimate from Fit Parametric Survival)</CODE></PRE> <P>I have verified this is true for all the groups except the last one i.e. group 19 as shown below. How do I get the alpha of the group 19 from the intercept and estimates of the Fit Parametric Survival table?</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Screenshot 2025-07-02 175018.png" style="width: 999px;"><img src="https://community.jmp.com/t5/image/serverpage/image-id/77744i001804510F88948A/image-size/large?v=v2&amp;px=999" role="button" title="Screenshot 2025-07-02 175018.png" alt="Screenshot 2025-07-02 175018.png" /></span></P> Thu, 03 Jul 2025 01:02:33 GMT https://community.jmp.com/t5/Discussions/What-is-the-relation-between-Fit-Parametric-Survival-and-Fit/m-p/883004#M104732 FrequencyBison9 2025-07-03T01:02:33Z