Summarize Contents of Variates
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Produce summary statistics for data contained within variates.

Variates

Specifies the variates containing the data to be analysed. The button allows multiple selections to be copied from the Available Data list.

By Groups

Allows you to specify a factor of groupings, so that summaries can be produced for each group in turn.

Available Data

This lists variates that are available for analysis. Double-click on a name to copy it to the current input field; alternatively, you can type in the name directly.

Options

Provides a range of statistics that can be used to describe the data. Select the check boxes for the statistics that you wish to use to calculate for the data. You can choose one or more of the following:
No. of ValuesNumber of values including missing values
No. of Non-missing ValuesNumber of values excluding missing values
No. of Missing ValuesNumber of missing values
Arithmetic MeanMean of the sample - ∑x/n
MedianMedian value that divides a sample into two equally sized groups
MinimumMinimum value in sample
MaximumMaximum value in sample
VarianceVariance of sample - ∑(xi-mean(x))2/(n-1)
Standard DeviationStandard deviation of sample - √ (Variance)
RangeRange of the values in the sample, i.e. maximum - minimum
Lower QuartileThe lower quartile is the value l such that 25% of a sample are less than l
Upper QuartileThe upper quartile is the value u such that 25% of a sample are greater than u
Sum of ValuesSum of the values in the sample
More summary statistics such as standard of the mean, skewness, and kurtosis can be selected by clicking on the More Statistics button.

Graphics

Provides various graphical summaries of the data that can be used to explore the distribution of the data. You can select one or more from histogram, boxplot, stem and leaf, and Normal plot.

See Also