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...nsity(Data)) text(25000,0.00004, paste("\u03c3 = ", format(round(sd(Data),digits=3),big.mark=",")), font=2, col="blue") Now when I try to turn the plot into a pdf, the sigma symbol no longer appears. It is replaced by two periods. pdf(file="C:/Rquestion.pdf") ### Note: You can choose a place for this file to be saved set.seed(1) Data=rnorm(100,sd=10000) plot(density(Data)) text(25000,0.00004, paste("\u03c3 = ", format(round(sd(Data),digits=3),big.mark=",")), font=2, col="blue") dev.off() Is...

Let's say you want to compare "one observation" with a sample, how would you use R to get a p-value for that single observation itself? To clarify what I'm asking: We know you use a one-sample t test to compare an actual sample to a hypothetical value, and a Wilcoxon test if it's not normally distributed, in R either "t.test( )" or "wilcox.test( )".