Group 1 Has a Mean of 13

question 45

Multiple Choice

Group 1 has a mean of 13.4 and group 2 has a mean of 15.2. Both populations are known to have a variance of 9.0 and each sample consists of 18 items. What is the test statistic to test for equality of population means?

• A)-1.755
• B)-1.643
• C)-1.800
• D)-1.285

---

Definitions:

AV Valves

The atrioventricular valves, consisting of the tricuspid and mitral valves, are located between the atria and ventricles in the heart, regulating blood flow and preventing backflow.

Semilunar Valves

Heart valves located at the bases of the aorta and the pulmonary artery that prevent backflow of blood into the ventricles during systole by opening to allow blood ejection and closing during diastole.

Streptokinase

An enzyme used to dissolve blood clots in the treatment of heart attack and pulmonary embolism.

Tissue Plasminogen Activator

An enzyme that helps dissolve blood clots by converting plasminogen into plasmin, used in the treatment of stroke and other clotting conditions.