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:

Union Dues

Regular payments made by members to support the operations and activities of their labor union.

Union Security

Arrangements within labor agreements that ensure the financial and organizational stability of the workers' union, often through membership mandates or dues requirements.

Grievance Procedure

A formal process through which employees can report complaints or concerns regarding work conditions or treatment.

Settlement

The resolution or agreement reached in a dispute, negotiation, or legal case outside of or within a court process.