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Chapter 8 Summarizing Data 263
Summarizing Columns
Summarizing Columns
The Tables > Summary command calculates various summary statistics, including the mean and
median, standard deviation, minimum and maximum value, range, percentage of total, sum variance,
standard error, coefficient of variation, and user-specified quantiles.
In a summary table:
• A single row exists for each level of a grouping variable you specify. If no grouping variable is
specified, a single row exists for the full data table.
• When there are several grouping variables, the table contains rows for each combination of levels of
all the grouping variables.
• In addition to one column for each grouping variable, the table contains frequency counts in a
column named N Rows with counts for each grouping level.
• The summary table is linked to its source table. When you select rows in the summary table, the
corresponding rows are highlighted in its source table.
• If the source table’s column(s) contain value labels, the value labels are displayed in the new table.
• A summary table is not saved when you close it unless you select File > Save As to give it a name
and location.
Figure 8.1 Example of Creating a Summary Table with One Grouping Variable
8 Summarizing Data