/**
*
* @return null|qtism\common\datatypes\Float
*/
protected function processMean()
{
$operands = $this->getOperands();
$operand = $operands[0];
$result = OperatorsUtils::mean(self::filterValues($operand->getArrayCopy()));
return $result !== false ? new QtiFloat(floatval($result)) : null;
}
/**
* @dataProvider meanProvider
*
* @param array $sample
* @param number $expected
*/
public function testMean(array $sample, $expected)
{
$result = OperatorsUtils::mean($sample);
$this->assertSame($expected, $result);
}
