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Connective letters from summary statistics

Hi all

I am currently working on a research project for which i had to calculate some parameters (aka I have their means and standard deviation but not a full table of all repeats). I am trying to do a Tukey HSD test to compare these means and obtain a connective letters report but this seems to be rather impossible (as my table only contains 'one repeat' per measurement/calculation and I do not seem to be able to tell jump that the 2 columns in my data file are already the mean and standard deviation instead of just a random measurement). Does anyone know how to fix this/has a script for this? I am currently working on JMP Pro 16. In the attachment is an example of the datafile

Kind regards

Analytics

Data Table

Re: Connective letters from summary statistics

I don't see how this is possible. You already have means and standard deviations, but there is no data on the sample size in each group nor do we know anything about the distribution shapes. The Tukey HSD report is based on the ANOVA using the underlying data. You can't go directly from means and standard deviations to testing for significant differences without some additional information. If you are willing to simulate data within each group (e.g. by assuming normal distributions with the given means and standard deviations and assuming sample sizes), then you can do the ANOVA and Tukey HSD. But I don't believe you can go from what you have without additional assumptions/data. If I'm wrong, someone will correct me.

Re: Connective letters from summary statistics

@dale_lehman is correct that you do need more information. If you know the sample size, you can make the calculations. Here is a link to a script that will perform the necessary calculations.

https://community.jmp.com/t5/JMP-Scripts/ANOVA-from-Data-Summary/ta-p/21487

Re: Connective letters from summary statistics

Hi Dan

Ofcourse I have the sample sizes as well and the assumption of a normal distribution should be valid. I tried using that script before but it does not work as described in the article (no screens popping up or anything). The script is alsof just one line of programming (unless I'm mistaking ofcourse)

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