When attempting to compute the CI in R, I'm observing differences:
x=c(25,30,15,45,22,54)
#IC 1 install.packages("Rmisc") library(Rmisc) CI(x,0.95) # [16.30429 ; 47 .36238]
#IC2 lclm=mean(x)-(1.96*sd(x)/sqrt(length(x))) #19.99285 Uclm=mean(x)+(1.96*sd(x)/sqrt(length(x))) #43.67382