R help - Apr 2015 - Inference Syntax

Hi All,

This is my first post in the community.
I am currently working on finding some inferences from my sample data and
the code I have used is:
inference(y = nc$weight, x = nc$habit, est = "mean", type =
"ht", null = 0,
method = "theoretical"). While researching more on the code as I have
just
started using R, online I found alternative also as a keyword for the syntax
which has option as either less, greater or two sided. I am unsure what it
is referring to. 
If someone would please explain the alterative keyword. Thank you. 



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On 30/04/15 23:22, Shivi82 wrote:
> Hi All,
>
> This is my first post in the community.
> I am currently working on finding some inferences from my sample data and
> the code I have used is:
> inference(y = nc$weight, x = nc$habit, est = "mean", type =
"ht", null = 0,
> method = "theoretical"). While researching more on the code as I
have just
> started using R, online I found alternative also as a keyword for the
syntax
> which has option as either less, greater or two sided. I am unsure what it
> is referring to.
> If someone would please explain the alterative keyword. Thank you.
The word "alternative" refers to the alternative hypothesis in the
test
that you are carrying out.

Where does the function inference() come from?  I can find no trace of 
it in a standard R installation, and the term is too broad to search for 
effectively.  Please do not expect the R-help list to be telepathic.

cheers,

Rolf Turner

-- 
Rolf Turner
Technical Editor ANZJS
Department of Statistics
University of Auckland
Phone: +64-9-373-7599 ext. 88276
Home phone: +64-9-480-4619

Hi Shiv82,
This doesn't look like it comes from the SharpeR, iBATGCH, inference
packages and there are too many other packages using the term to
easily identify it. As Rolf pointed out, alternative hypotheses are
typically framed as:

"two-sided" - non-directional, only specifies that the comparison of
statistics shows a difference.

"less" or "greater" - specifies that one particular
statistic (usually
that of an experimental group) in the comparison must be less or
greater than the other (usually the reference group).

Jim

On Fri, May 1, 2015 at 7:46 AM, Rolf Turner <r.turner at auckland.ac.nz>
wrote:
> On 30/04/15 23:22, Shivi82 wrote:
>>
>> Hi All,
>>
>> This is my first post in the community.
>> I am currently working on finding some inferences from my sample data
and
>> the code I have used is:
>> inference(y = nc$weight, x = nc$habit, est = "mean", type =
"ht", null >> 0,
>> method = "theoretical"). While researching more on the code
as I have just
>> started using R, online I found alternative also as a keyword for the
>> syntax
>> which has option as either less, greater or two sided. I am unsure what
it
>> is referring to.
>> If someone would please explain the alterative keyword. Thank you.
>
>
> The word "alternative" refers to the alternative hypothesis in
the test that
> you are carrying out.
>
> Where does the function inference() come from?  I can find no trace of it
in
> a standard R installation, and the term is too broad to search for
> effectively.  Please do not expect the R-help list to be telepathic.
>
> cheers,
>
> Rolf Turner
>
> --
> Rolf Turner
> Technical Editor ANZJS
> Department of Statistics
> University of Auckland
> Phone: +64-9-373-7599 ext. 88276
> Home phone: +64-9-480-4619
>
>
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