function testCalculateAverage(Statistic $statistic){
$values = new ArrayObject(array(1,2,3,4,5,6, 6.33));
assertTrue($statistic->average($values->getIterator()) == 3.90);
}
/**
* @test
*/
public function getAverage()
{
$values = $this->listFilteredByOneSubgroup(true);
$values = $this->getValuesFromData($values);
$this->assertEquals(200, $this->statistic->average($values));
}
private function average($values)
{
$this->writeValue($this->statistic->average($values));
}