R help - Jul 2022 - Cumulative probability from binomial distribution

Hi,

I have the below output.
> pbinom(0.10, 1, 0.40)
[1] 0.6

I am curious what it means to serve a fraction as the first argument
in pbinom()?

Thanks for your time

Sounds uncomfortably close to a statistical or philosophical question. Does a
reminder that the "p" in "pbinom" means "cumulative
probability" help?

q <- seq( -1, 2, 0.001 )
p <- pbinom( q, 1, 0.4 )
plot( q, p, type = "l" )


On June 30, 2022 6:08:42 AM PDT, Christofer Bogaso <bogaso.christofer at
gmail.com> wrote:
>Hi,
>
>I have the below output.
>
>> pbinom(0.10, 1, 0.40)
>
>[1] 0.6
>
>I am curious what it means to serve a fraction as the first argument
>in pbinom()?
>
>Thanks for your time
>
>______________________________________________
>R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.
-- 
Sent from my phone. Please excuse my brevity.

It means that the probability of an outcome less than or equal to 0.10 is 0.6. 

0 is the only possible such outcome but that is not a problem for the
definition, and it is fairly common to use cumulative distribution functions for
discrete outcomes defined as right-continuous step functions on the real line.

-pd
> On 30 Jun 2022, at 15:08 , Christofer Bogaso <bogaso.christofer at
gmail.com> wrote:
> 
> Hi,
> 
> I have the below output.
> 
>> pbinom(0.10, 1, 0.40)
> 
> [1] 0.6
> 
> I am curious what it means to serve a fraction as the first argument
> in pbinom()?
> 
> Thanks for your time
> 
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
-- 
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Office: A 4.23
Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com