SPSS® 12.0 Command Syntax Reference

K-W Subcommand
Syntax
Operations
Example
NPAR TESTS K-W=varlist BY variable(value1,value2)
NPAR TESTS 1091
K-W (alias KRUSKAL-WALLIS) tests whether k independent samples defined by a grouping
variable are from the same population. The output shows the number of valid cases and the
mean rank of the variable in each group in the Ranks table and the chi-square, degrees of
freedom, and probability in the Test Statistics table.
• The minimum specification is a test variable, the keyword BY, a grouping variable, and a
pair of values in parentheses.
• Every value in the range defined by the pair of values for the grouping variable forms a
group.
• Cases from the k groups are ranked in a single series, and the rank sum for each group is
computed. A test statistic is calculated for each variable specified before BY.
• Kruskal-Wallis H has approximately a chi-square distribution.
• Cases with values other than those in the range specified for the grouping variable are
excluded.
NPAR TESTS K-W=V1 BY V2(0,4).
• This example tests V1 for groups defined by values 0 through 4 of V2.
KENDALL Subcommand
Syntax
NPAR TESTS KENDALL=varlist
KENDALL tests whether k related samples are from the same population. W is a measure of
agreement among judges or raters where each case is one judge’s rating of several items
(variables). The output includes the mean rank for each variable in the Ranks table and the
valid number of cases, Kendall’s W, chi-square, degrees of freedom, and probability in the Test
Statistics table.
The minimum specification is a list of two variables.