The VARIANCE command must be used as either a query or as a source in another analyzer-command function. Form a query by ending the VARIANCE statement with a question mark (?). When used as a query, VARIANCE gives the variance to the computer. Use VARIANCE as a source by incorporating the VARIANCE statement into the source of any command having predened function in its syntax diagram. When VARIANCE is used as a source, the variance is used for operation by the command that contains VARIANCE.
