.BG
.FN mean
.TL
Mean (Arithmetic Average) Value
.CS
mean(x, trim=0)
.AG x
numeric.
.NA
.AG trim
fraction of values to be trimmed off
each end of the ordered data.
.RT
mean of x.
If `x' contains any `NA's, the result will be `NA'.
If `trim' is nonzero, the
computation is performed to single precision accuracy.
.EX
mean(scores)    # Computes the average
.KW robust
.KW math
.WR
