If Two Random Samples of Sizes 30 and 36 Are $\bar { X } _ { 1 }$

question 111

Multiple Choice

If two random samples of sizes 30 and 36 are selected independently from two populations with means 78 and 85, and standard deviations 12 and 15, respectively, then the standard error of the difference $\bar { X } _ { 1 }$ and $\bar { X } _ { 2 }$ is equal to:

• A)0.904
• B)3.324
• C)3.391
• D)0.833

---

Definitions:

Probable Diagnosis

A diagnosis made when the evidence strongly suggests a particular disease or condition but is not conclusive.

Inpatient Hospital

A hospital setting where patients are admitted and stay overnight or longer, receiving medical treatment and care.

Physician's Office

A medical facility where doctors and other healthcare professionals provide consultations, diagnoses, and treatment to patients.

Urgent Care

Healthcare services provided for illnesses or injuries that require prompt attention but are not serious enough to warrant an emergency room visit.