For more information on the valid strings for this argument, see Conditions for summary functions.
Enables you to find the population standard deviation of a set of values in your report. For example:
The following examples are applicable to both Basic and Crystal syntax:
PopulationStdDev({file.SCORES})
Calculates the population standard deviation of all values in the Scores field for the entire report.
PopulationStdDev({orders. AMOUNT}, {orders.CUSTOMER ID})
Calculates the population standard deviation for the orders in each group of orders in the Amount field. The orders are separated into groups whenever the value in the Customer ID field changes.
PopulationStdDev({file.RESULTS}, {file.DATE}, "daily")
Calculates the variation for each group of laboratory test results in the Results field. The test results are separated into groups whenever the value in the Date field changes to a new day.
The following example is applicable to Crystal syntax:
PopulationStdDev([{file.QTY1}, {file.QTY2}, {file.QTY3}, {file.QTY4}])
Returns 3.57 where Qty1 = 2, Qty2 = 2, Qty3 = 10, and Qty4 = 8.
Population standard deviation is calculated using the following technique:
Note: Using this function in a formula forces the formula to be evaluated at print time.
For more information on evaluation time considerations, see the Evaluation Time functions.
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