Paired t-test

KNIME Analytics Platform
1

Hi all

Would any one have tried to run paired t-test on more than one pair of data then append the results into one table?

I need to run the test on over 600 pairs of dependent samples then append the test results in one table to see which pair gives a statistically significant results.

Would anyone have any suggestions?

Thanks
Jennifer

2

Hi jennifer can you provide a csv with the data and explain a little more on what you mean by ‘append the test results in one table to see which pair gives a statistically significant results.’ you want to run several t-tests and then create a table with the results ?

1 Like
3

Hi JCcanelhas

I have attached a sample of the dataset for the analysis.sample data.xlsx (12.6 KB)

Essentially I like to run paired t-test on V1 and V2 for each of the Site ID, then create a table of the results.

Thanks for your help.

Regards
Jennifer

4

00_KNIME_project(jennifer).knwf (24.0 KB)

See if this helps, I’ve changed your XLS in order to have more than 1 sample per site, so ignore the data, I’ve used a group loop to iterate through each site, then I’ve performed the t test, in order to kkep a track on the site, i’ve appended the site name using a variable.

1 Like
5

Hi JCanelhas

This worked!

Just a question on the GroupBy node - why using First(Date) by Site ID?

Thanks
Jennifer

6

thats just to have a value, its acually not used

7

Hi there

I actually figured that out too.

Thanks so much for your help and I was able to modify your workflow incorporating R nodes to do a different testing.

Many thanks again
Jennifer

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