<http://r.789695.n4.nabble.com/file/n4645492/graph.jpg> I need to replicate this graph. It is a simple normal distribution-curve with mean 90 and sd=10. The vertical bars is the 95% confidence limit of the mean. How on earth do I add those confidence limits? Im thinking something that has to do with: c(0.025,0.975) But I really dont know :S Any help? -- View this message in context: http://r.789695.n4.nabble.com/Need-some-help-reproducing-a-graph-tp4645492.html Sent from the R help mailing list archive at Nabble.com.
Need some help reproducing a graph
5 messages · dLevy, David Winsemius, Bert Gunter +1 more
On Oct 8, 2012, at 2:43 PM, dLevy wrote:
<http://r.789695.n4.nabble.com/file/n4645492/graph.jpg> I need to replicate this graph. It is a simple normal distribution-curve with mean 90 and sd=10. The vertical bars is the 95% confidence limit of the mean. How on earth do I add those confidence limits? Im thinking something that has to do with: c(0.025,0.975) But I really dont know :S
?segments
David Winsemius, MD Alameda, CA, USA
Homework? We don't do homework here. Bert Sent from my iPhone -- please excuse typos.
On Oct 8, 2012, at 4:20 PM, dLevy <mansten at hotmail.com> wrote:
<http://r.789695.n4.nabble.com/file/n4645492/graph.jpg> I need to replicate this graph. It is a simple normal distribution-curve with mean 90 and sd=10. The vertical bars is the 95% confidence limit of the mean. How on earth do I add those confidence limits? Im thinking something that has to do with: c(0.025,0.975) But I really dont know :S Any help? -- View this message in context: http://r.789695.n4.nabble.com/Need-some-help-reproducing-a-graph-tp4645492.html Sent from the R help mailing list archive at Nabble.com.
______________________________________________ R-help at r-project.org mailing list 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.
Its not homework, it is a seminar exercise that I need to complete in order to learn enough in order to take the home exam next month. There are no lecture slides, just a generic textbook in R for bio statistics. Ive been trying to solve this problem for almost a week now but I am stuck. -- View this message in context: http://r.789695.n4.nabble.com/Need-some-help-reproducing-a-graph-tp4645492p4645508.html Sent from the R help mailing list archive at Nabble.com.
Hello, Try qq <- qnorm(0.975) x <- 90 + c(-1, 1)*qq*10 f <- function(x) dnorm(x, 90, 10) curve(f, from = 60, to = 120) segments(x, 0, x, f(x)) Hope this helps, Rui Barradas Em 09-10-2012 00:48, dLevy escreveu:
Its not homework, it is a seminar exercise that I need to complete in order to learn enough in order to take the home exam next month. There are no lecture slides, just a generic textbook in R for bio statistics. Ive been trying to solve this problem for almost a week now but I am stuck. -- View this message in context: http://r.789695.n4.nabble.com/Need-some-help-reproducing-a-graph-tp4645492p4645508.html Sent from the R help mailing list archive at Nabble.com.
______________________________________________ R-help at r-project.org mailing list 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.