[R] Help for Use of R software

David Winsemius dw|n@em|u@ @end|ng |rom comc@@t@net
Sun Jun 6 19:44:18 CEST 2021

A google-search of the term brings up as its first hit a link to a page 
on the rdocumentation.org website that indicates that theTrialSize 
<https://www.rdocumentation.org/packages/TrialSize/versions/1.4> has a 
function named "TwoSampleProportion.NIS".

If you executed these commands in an R console:


.... you would probably see a help page that has almost the same content 
as the page at rdocumentation.org

(A "two sample z-test", at least as I understand such a label, is not 
necessarily a test for non-inferiority. That page doesn't actually 
describe the results of a calculation using the 
"TwoSampleProportion.NIS" function but if you go to the code you find 
it's not doing a test of any sort but rather doing an oversimplified 
sample size calculation.)

You appear to not understand that R is a system of packages that are 
optionally installed and loaded into the core programming environment. I 
would advise that you do some self-learning about how to use R (or) that 
you contract with a person who can provide the skills need to both 
educate you about the statistical issues in trial design and run your 
analyses for you.

You should also read the fine Posting Guide:




On 6/6/21 1:29 AM, Lee Simon wrote:
> Dear Sir/Madam,
> May I seek for your kind help for the use of R software for conducting
> two-proportional z-test which is test for non-inferiority? I have found one
> saying using function (TwoSampleProportion.NIS(alpha, beta, p1, p2, k,
> delta, margin) but the software said there is not such function. Thank you
> very much for your kind help.
> With kindest regards,
> Simon
> 	[[alternative HTML version deleted]]
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