Re: [R] Confidence-Intervals.... help...

From: Sarah Goslee <sarah.goslee_at_gmail.com>
Date: Sun 08 Apr 2007 - 17:33:09 GMT

Hm... sounds like a homework problem to me...

Maybe start by figuring out how to do it without R - what's the approach, and how would you calculate it? Then search R help for the possible key words you came up with.

Sarah

On 4/8/07, Jochen.F <jjfahr@ucalgary.ca> wrote:
>
> Hi...
>
> I have to use R to find out the 90% confidence-interval for the sensitivity
> and specificity of the following diagnostic test:
>
> A particular diagnostic test for multiple sclerosis was conducted on 20 MS
> patients and 20 healthy subjects, 6 MS patients were classified as healthy
> and 8 healthy subjects were classified as suffering from the MS.
>
> Furthermore, I need to find the number of MS patients required for a
> sensitivity of 1%...
>
> Is there a simple R-command which can do that for me?
>
> I am completely new to R...
>
> Help please!
>
> Jochen
> --

-- 
Sarah Goslee
http://www.functionaldiversity.org

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Received on Mon Apr 09 03:36:17 2007

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