SUMMARY Subcommand (RELIABILITY command)

SUMMARY displays summary statistics for each individual item in the scale.

• SUMMARY is cumulative. If you enter it more than once, all requested statistics are produced for the scale.
• You can specify one or more of the following:

MEANS. Statistics on item means. The average, minimum, maximum, range, ratio of maximum to minimum, and variance of the item means.

VARIANCE. Statistics on item variances. This displays the same statistics as for MEANS.

COVARIANCES. Statistics on item covariances. This displays the same statistics as for MEANS.

CORRELATIONS. Statistics on item correlations. This displays the same statistics as for MEANS.

TOTAL. Statistics comparing each individual item to the scale composed of the other items. The output includes the scale mean, variance, and Cronbach’s α without the item, and the correlation between the item and the scale without it.

ALL. All applicable summary statistics.