Create-Interval-Plot
To create an interval plot, you can select one or more Y data and use the Plot:Statistics:Interval Plot menu entry.
To create a grouped interval plot, you can create a grouped box chart with indexed data or raw data first and select Box_Interval Plot from Graph Theme drop-down list, the menu entry is Plot:Statistics:Grouped Box Chart - Indexed Data or Plot:Statistics:Grouped Box Chart - Raw Data.