User Guide

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Chapter 37
Descriptives for. Produces descriptive statistics for scales or items across cases.
Available options are Item, Scale, and Scale if item deleted.
 Scale if item deleted. Displays summary statistics comparing each item to the scale
composed of the other items. Statistics include scale mean and variance if the item
were delete
d from the scale, correlation between the item and the scale composed
of other items, and Cronbach’s alpha if the item were deleted from the scale.
Summaries. Provides descriptive statistics of item distributions across all items in the
scale. Ava
ilable options are Means, Variances, Covariances, and Correlations.
 Means. Su
mmary statistics for item means. The smallest, largest, and average
item means, the range and variance of item means, and the ratio of the largest to
the smallest item means are displayed.
 Variances. Summary statistics for item variances. The smallest, largest, and
average it
em variances, the range and variance of item variances, and the ratio of
the largest to the smallest item variances are displayed.
 Covariances. Summary statistics for inter-item covariances. The smallest,
largest, and average inter-item covariances, the range and variance of inter-item
covarian
ces, and the ratio of the largest to the smallest inter-item covariances
are displayed.
 Correlations. Summary statistics for inter-item correlations. The smallest,
largest, and average inter-item correlations, the range and variance of inter-item
correlat
ions, and the ratio of the largest to the smallest inter-item correlations
are displayed.
Inter-Item. Produces matrices of correlations or covariances between items.
ANOVA Table. Produces tests of equal means. Available alternatives are None, F test,
Friedma
n chi-square, or Cochran chi-square.
 FTest.
Displays a repeated measures analysis-of-variance table.
 Friedm
an ch i-square.
Displays Friedman's chi-square and Kendall's coefficient of
concordance. This option is appropriate for data that are in the form of ranks.
The chi-square test replaces the usual F test in the ANOVA table.
 Cochran chi-square. Displays Cochran's Q. This option is appropriate for data that
are dich
otomous. The Q statistic replaces the usual F statistic in the ANOVA
table.