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[Bug]: Independent Samples t-test unable to calculate when 3 groups present but one group filtered out. #2893

Closed DudleyUOC closed 2 weeks ago

DudleyUOC commented 2 weeks ago

JASP Version

0.19.0

Commit ID

No response

JASP Module

T-Tests

What analysis are you seeing the problem on?

Independent Samples t-test

What OS are you seeing the problem on?

Windows 10

Bug Description

<img width="1196" alt="JASP independent t-test bug" src="https://github.com/user-attachments/assets/d053f4f6-2268-4

Feedback Frequency Netball Shooting Part A.zip

Screenshot and data attached. I have a grouping variable with three groups. I want to do a comparision (classical independent t-test) between two of the groups. I have filtered the variable out using both the shown method and the filter function. When I move the grouping variable the message "Maximum number of levels is 2. Variable Group has 3 levels."

I have replicated the error with multiple data sets. I have saved and close the file and reopened the file and the error persists. Error applies to Bayesian independent t-test

Expected Behaviour

In previous versions of JASP. Having filtered out 1 of the three groups the test would run a comparision between the remaining two groups.

Steps to Reproduce

  1. Open filter window for grouping variable 2.Deselect one of the three groups. 3.Open t-test menu and select Classical independent samples t-test
  2. Move dependent variables to selection box
  3. Move Group to Grouping variable selection box
  4. Error message "Maximum number of levels is 2. Variable Group has 3 levels." appears ...

Log (if any)

No response

More Debug Information

No response

Final Checklist

tomtomme commented 2 weeks ago

Thx for the report. This is solved in https://github.com/jasp-stats/jasp-desktop/pull/5645 There will be a new version of JASP hopefully in some weeks, which includes the fix.

Also this is a duplicate of https://github.com/jasp-stats/jasp-issues/issues/2853