similar to: Re : CI

I have a quick question, please. Does R have function to compute i.e. a 90% confidence interval for the mean for these numbers? > mean (6,11,5,14,30,11,17,3,9,3,8,8) [1] 6 I thought pt or qt would give me the interval, but it seems not. thx much. ej

What would be the R formulae for a two-sided test? I have a formula for a one-sided test: powertest <- function(a,m0,m1,n,s){ t1 = -qnorm(1-a) num = abs(m0-m1) * sqrt(n) t2 = num/s pow = pnorm(t1 + t2) } Would you pls let me know if you know of? Thank you, ej

A quick question, please! How do you extract a certain value of vector? i.e. x = c(2,5,3,6,21,3,6,24, ....) How do you get the 1st one (which is 2); the 5th one (which is 21); etc? thx much, ej [[alternative HTML version deleted]]

The expected number of bladder cancer over next 20 years a tire industry is 1.8. Poission distribution is assumed to hold and 6 reported deaths are caused by bladder cancer among the employees. Trying to find how unusual this event is. > ppois(q=6, lambda=1.8, lower.tail = TRUE, log.p = FALSE) [1] 0.9974306 not sure if ppois is the right one to use and the parameters... thx much

R-experts: A quick question, please. >From a lab exp, I got 12 positives out of 50. To get 90% CI for this , I think binom.test might be the one to be used. Is there a better way or function to calculate this? > binom.test(x=12, n=50, p=12/50, conf.level = 0.90) Exact binomial test data: 12 and 50 number of successes = 12, number of trials = 50, p-value = 1 alternative

After reading the digital shortcut and the documentation on the web site I''m confused. Which one should I use? pen, balance or nginx ? I don''t want to use a behemoth like appache and ssl is not needed so it reduces my choice to those three only.... What are the pros and cons of each? I don''t have much money, so the less ressources I use the better it is for me.... As

I have the clinical study data. Year 0 Year 3 Retinol (nmol/L) N Mean +-sd Mean +-sd Vitamin A group 73 1.89+-0.36 2.06+-0.53 Trace group 57 1.83+-0.31 1.78+-0.30 where N is the number of male for the clinical study. I want to test if the mean serum retinol has increased over 3 years among subjects in the vitamin A group. > 1.89+0.36

Hi, I am a bit stuck on specifying ui and ci. I have read Lange's book ((1999) Numerical Analysis for Statisticians) to his approach and unfortunately his descriptions were not helpful for me. Here is what I have: ui <- rbind(c(0, -1, 0), c(0, 0, -1)) ci <- c(0, -1, -1)) theta <- c(0.5, 0.5, 0.1) My goal is to feed these into constrOptim

Hi, I'm proud to say that now we've got a CI for supermin and libguestfs available: https://ci.centos.org/view/libguestfs/ We have three jobs that currently runs every night: - supermin: builds supermin from git master, and runs the test suite - libguestfs: builds libguestfs from git master using the supermin built earlier, and runs the test suite; this is only triggered if the

Hi I'd like to you know if this is possible to do this with swfdec, or even to know if one day, it will be possible I have a swf player that grabs some piece of sprites, music and move all this in some kind of a cartoon Is it possible with swfdec to record this cartoon into an avi file ? Thanks Enzo ___________________________________________________________________________

Hello, We're using samba 3.0.24 on a Linux box, to access and backup some XP boxes. smbclient access is okay, but there is something quite weird with the tar subfunction ----- $ smbclient //xpbox/Documents -U someuser -d 2 -Tc /tmp/tarfile . added interface ip=192.168.1.xxx bcast=192.168.1.255 nmask=255.255.255.0 session setup failed: NT_STATUS_LOGON_FAILURE ----- Smbclient does NOT ask us

Hello, When using bargraph.CI in package sciplot can the bars for each group be different colors? How do I select the color for each group? When I use this instead of the default (SD vs SE): bargraph.CI(x.factor = dose, response = len, data = ToothGrowth, ci.fun= function(x) c(mean(x)-sd(x), mean(x) + sd(x)) ) Am I getting 95% CI bars? Thank you kindly, Michael Just

Hi, I am trying to calculate confidence intervals using ci.numeric from epicalc package. If I generate a normal set of data and find the 99% and 95% CI, they seem too narrow to me. Am I doing something wrong?? The IQR goes from -0.62 to 0.62, so I thought the CI limits should be more extreme than these values. x<- rnorm(200,0,1) ci.numeric(x=mean(x),n=200,sds=sd(x),alpha=0.05) n

I've installed wine version 1.1.37 on Slackware 13.0 32-bit using pkginstall. Internet explorer loads via wine: example cd /home/tim/.wine/drive_c/Program Files/Internet Explorer wine iexplore.exe

Hi folks... check this out.. > GLU<-lme(gluc~rt*cd4+sex+age+rf+nadir+pharmac+factor(hcv)+factor(hbs)+ + haartd+hivdur+factor(arv), + random= ~rt|id, na.action=na.omit) > intervals(GLU)$fixed lower est. upper (Intercept) 67.3467070345 7.362307e+01 7.989944e+01 rt *0.0148050160* 6.249304e-02 1.101811e-01 cd4

Hello! I am trying to duplicate the studentized bootstrap confidence interval calculations in boot.ci() without using boot.ci(). My w/o boot.ci() calculations are close to boot.ci() using the same object from implementation of boot(), but not quite the same (I think the differences are due to how quantiles are computed for z*). Through examining the boot.ci() code, I can see there is a call

hi List and Manuel, I have encounter the following problem with the function "lineplot.CI".? I'm running R 2.10.1, sciplot 1.0-7 on Win XP.? It seems like it's a scoping issue, but I couldn't figure it out. Thanks! ...Tao > lineplot.CI(x.factor = dose, response = len, data = ToothGrowth)??? ## fine > lineplot.CI(x.factor = dose, response = len, data = ToothGrowth,

I've just been trying to get my Samba 3.0.0-2 build to work with CUPS. The rpm I downloaded from the Samba site was not compiled with CUPS library support. Which is why I am assuming that having added printing = cups in my conf file things are not working. If I use the source rpm can I force the build to include CUPS library support ? Or do I have to build from scratch? thanks Alan

Hi, I'm trying to copy my CentOS install to a new drive. - old drive is /dev/hda and had hda1 : /boot hda2 : swap hda3 lvm hda5 : lvm hda4 : /usr/local - new drive is /dev/hdb hdb1 : /boot hdb2 : swap hdb3 : / I decided to get rid of lvm which is useless to me. I've created and formated the new partitions and copied anything from the old drive to the new one

A quick question please! How do you rename column names? i.e. V1 --> Apple; V2 --> Orange, etc. thx much ej [[alternative HTML version deleted]]