INTERVAL Subcommand (GRAPH command)

The INTERVAL subcommand adds errors bars to the chart. This is different from the ERRORBAR subcommand. The ERRORBAR subcommand adds error bar data elements. INTERVAL adds errors bars to other data elements (for example, areas, bars, and lines).

Error bars indicate the variability of the summary statistic being displayed. The length of the error bar on either side of the summary statistic represents a confidence interval or a specified number of standard errors or standard deviations. GRAPH supports error bars for simple or clustered categorical charts displaying means, medians, counts, and percentages.

The keywords are not followed by an equals sign (=). They are followed by a value in parentheses.

Example

GRAPH
  /BAR(SIMPLE)=COUNT BY jobcat
  /INTERVAL CI(95).