In Evaluative Research, the Term for an Unknown or Unanticipated

question 7

Multiple Choice

In evaluative research, the term for an unknown or unanticipated element that affects the results of a measurement is known as the

• A) variable
• B) Y variable
• C) Z variable

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Definitions:

Second Heart Sound

The second heart sound is produced by the closing of the aortic and pulmonary valves at the beginning of ventricular diastole.

Ventricular Systole

The phase of the cardiac cycle in which the ventricles contract, pumping blood out of the heart into the arterial system.

Ventricular Diastole

Dilation of the heart ventricles.

ECG

Electrocardiogram, a test that measures the electrical activity of the heart over a period of time.