.BG
.VE $Header: /usr3/s/current/s/.help/RCS/mean,v 1.2 83/12/30 19:30:37 rab Exp $
.FN mean
.TL
mean: Mean Value
.CS
mean(x, trim)
.PP
.AG x
numeric structure (missing values, NAs, are ignored).
.AG trim
fraction of values to be trimmed off each end of the ordered
data.  Default value 0.
.RT
(Trimmed) mean of x.
.EX
mean(scores,trim=.25)    # trims outer 50% of data
.KW basic*
.KW robust
.KW summary
.KW math
.WR
