On 06/03/17 19:35, laomeng_3 wrote:
this is not homework, just a case which I made by myself.
Be that as it may, if you are going to use R you should learn something about using R, rather than treating it as a magical black box.
There is, as far as I know (not really very far!) no currently existing function to "draw the confidence intervals". (Well, actually there is probably one out there somewhere. There is so *much* out there. But finding it is probably more effort than rolling your own.)
It is actually very easy to roll your own --- I think I could do it in 5 or 10 minutes. But I am *NOT* going to. (a) I am not going to do your work for you, even if it's not homework, and (b) you will *learn* something by figuring out how to do it yourself.
Hint: Read up on the functions lines() and segments(). And maybe arrows(). The function abline() might be of use as well.
cheers, Rolf Turner -- Technical Editor ANZJS Department of Statistics University of Auckland Phone: +64-9-373-7599 ext. 88276
On 2017-03-06 06:47 , Rolf Turner <mailto:r.tur...@auckland.ac.nz> Wrote: On 04/03/17 19:39, laomeng_3 wrote: > hi all I have a question about drawing the confidence interval . > > For instance,if I want to sample 100 times,and each time,the sample > size is 10,and the mean and sd is 15 and 1 respectively .I want to draw > the 100 confidence intervals(as the attachment) .Which function should > be used to draw the confidence interval ? This list does not answer questions about homework. (BTW, no attachment came through; only a *very* limited range of file types is permitted for attachments).
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