Your input and results
This uses the function getRCIfromSDandAlpha() in my CECPfuns R package to get the RCI but the maths is trivial and straight out of the original work on the RCI. The code combines that RCI with the standard formula for the Confidence Interval (CI) to give what I am calling a 'plausible interval' around that RCI based on the width of the CI you have requested. Until the n is large, the interval is wide which I think should help us understand this. Deciding when your dataset size is too small to give a usably tight plausible interval for the dataset RCI and hence that it would be better to use some 'referential' RCI is an interesting challenge. I'll do some modelling to address that soon.
App created by Chris Evans PSYCTC.org licenced under a Creative Commons, Attribution Licence-ShareAlike Please respect that and put an acknowledgement and link back to here if re-using anything from here.
This shiny app is one of a growing number in, my shiny server
Background and related resources
- my Rblog of posts about using R
- the glossary linked with
- the OMbook
- the CECPfuns R package
- and it's all part of the resources of PSYCTC.org
- and linked with the CORE system web site
There is a form if you want to contact me: so do please use that if you think there is anything wrong here or anything that could be improved.
There is also now an Email announcement list, never updating more than monthly, where I will put up developments of new apps here, a summary of updates to the glossary and new posts in the Rblog. You can sign up for that here.