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STATS(1) |STAT January 20, 1987
NAME
stats - print summary statistics
SYNOPSIS
stats [-v] [n min max sum ss mean var sd skew kurt se]
DESCRIPTION
_s_t_a_t_s prints summary statistics on the data read from the standard
input. The data can be in any format, as long as some white space
separates the input values. Non-numerical input values are ignored,
so care must be taken to insure that the input is correct.
OPTIONS
With no options, _s_t_a_t_s prints a summary table of statistic names and
values separated by a tab delimited = sign. When options are
supplied, _s_t_a_t_s prints only the value of the statistics requested, in
the order they were requested, on one line.
-v Verbose output. This option causes requested statistics to be
printed in name=value format.
n The number of real or integer values read in. If no values are
read in, then all statistics are zero. If one value is read in,
or if the variance of the distribution is zero, then all the
higher order statistics are zero.
min The minimum value.
max The maximum value.
sum The sum of the input values.
ss The sum of squares of the input values.
mean The arithmetic average: sum/n.
var The variance of the input, computed with "n-1" degrees of
freedom.
sd The square root of the variance.
skew The skewness of the distribution, as computed by SPSS and
desc(1).
kurt The kurtosis or pointiness of the distribution. Normal
distributions have a kurtosis of 3.
se The standard error of the input values.
NA Print the number of missing (NA) values. Missing data are
counted but not included in the analysis.
EXAMPLES
Print the standard error of the mean:
stats sd n | dm "x1 / x2^.5"
Print the range of the data:
stats min max | dm x2-x1
Print the sum of the first 100 integers:
series 1 100 | stats sum
Print a t-test of the mean against 0.0:
stats mean se | dm x1/x2
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.