Brings a standard error (var(x)/sqrt(n)) function
Details
SE is the historical error measurement in C. Gaucherel's papers.
Examples
x <- c(1, 2, 3, 4, 3, 4, 3, 2, 1, 4)
sd(x) # standard deviation
#> [1] 1.159502
se(x) # standard error
#> [1] 0.3666667
