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# Re: st: RE: Means for Metan

 From Aggie Chidlow To statalist@hsphsun2.harvard.edu Subject Re: st: RE: Means for Metan Date Mon, 12 Apr 2010 22:19:04 +0100

```Thanks Nick,
This is good, but could you suggest something for me to read about it,
please? I would like to understand what I am doing not just copy your
work. Thanks

On Mon, Apr 12, 2010 at 10:14 PM, Nick Cox <n.j.cox@durham.ac.uk> wrote:
> That's a bit clearer. Thanks.
>
> On the understanding that the first, second, ... observation contain information for 0, 1, ... mentions
>
> gen wt = _n - 1
> su j? [fw=wt]
>
> Nick
> n.j.cox@durham.ac.uk
>
> Aggie Chidlow
>
> Dear Nick (and others),
> Sincerely Appologies.
> It is not my intention for you to do any guess work...
>
> I am working on a meta-analysis the data I have looks like this:
>
> All Data Collection    | Name of the journal the article appeared
> Procedures together  | J1 J2    J3 J4                             | Total
>  Not Mention             | 68 41    32 25                            | 166
> One Step mention     | 17 14    17 12                            | 60
> Two Steps mention    | 8    9     8 5                              | 30
> Three Steps mention | 4     5    2 6                               | 17
> Four Steps mention   | 1    2     1 1                              | 5
> Five Steps mention    | 1  0 0 0                                  | 1
> ----------------------+--------------------------------------------+----------
> Total                         | 99 71 60 49                            | 279
>
> Today, it was suggested to me that I could calculate the mean number
> of mentions, within each of 4 journals and then
> perform metan to calculate a weighted average mean across the 4
> journals. In order to do this I have to transpose the data from the table
> above to this:
>
> Data Collection Procedures j1   j2   j3   j4   total
>> Not Mentioned              68   41   32   25   166
>> One Step Mentioned      17   14   17   12    60
>> Two Steps Mentioned     8    9    8    5    30
>> Three Steps Mentioned    4    5    2    6    17
>> Four Steps Mentioned     1    2    1    1     5
>> Five Steps Mentioned     1    0    0    0     1
>
>
> I am stuck at this point, because I am struggling to figure out how to
> calculate the mean number of mentions with their standard errors for
> this data.
>
> Many thanks in advance, Aggie
>
>
> On Mon, Apr 12, 2010 at 9:49 PM, Nick Cox <n.j.cox@durham.ac.uk> wrote:
>> Please show us the data you want to work on.
>> Please don't ask us to imagine, guess or work out what they looks like.
>>
>> Nick
>> n.j.cox@durham.ac.uk
>>
>> Aggie Chidlow
>>
>>
>> I have the following data:
>>
>> Steps                          j1   j2   j3   j4   total
>> Not Mentioned              68   41   32   25   166
>> One Step Mentioned      17   14   17   12    60
>> Two Steps Mentioned     8    9    8    5    30
>> Three Steps Mentioned    4    5    2    6    17
>> Four Steps Mentioned     1    2    1    1     5
>> Five Steps Mentioned     1    0    0    0     1
>>
>> I would very much appreciated if somebody could help me with the
>> syntax to calculate the
>> mean number of mentions with their standard error after  . keep j1 j2
>> j3 j4 total       and
>> . xpose,clear are used.
>>
>
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```

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