i posted this one in the FHIR chat forum but adding here for tracking

CQL > variance and pop variance

Erich Schulz: i think the 2 test case values are reversed...

Erich Schulz:
// PopulationVariance
// should be able to find PopulationVariance of a list
PopulationVariance_v: 2.5,

// Variance
// should be able to find Variance of a list
Variance_v: 2,
Erich Schulz: i have a test spreadsheet here

Erich Schulz:
// @Test: Variance
define Variance_v: Variance(

{1,2,3,4,5}

)
// @Test: PopulationVariance
define PopulationVariance_v: PopulationVariance(

{1.0,2.0,3.0,4.0,5.0}

)