RightAid Inc $\mu$ ₁ = $\mu$ ₂ = $\mu$ ₃
B)

question 61

Multiple Choice

RightAid Inc.operates a regional chain of 120 pharmacies.Each pharmacy's floor plan includes a greeting card department which is relatively isolated.Cathy Eng, Marketing Manager, feels that the level of lighting in the greeting card department may affect sales in that department.She chooses three levels of lighting (soft, medium, and bright) and randomly assigns six pharmacies to each lighting level.Cathy's null hypothesis is ___.

• A)\(\mu\) ₁ =\(\mu\) ₂ =\(\mu\) ₃
• B)\(\mu\) ₁ \(\neq\) \(\mu\) ₂ \(\neq\) \(\mu\) ₃
• C)\(\mu\) ₁\(\ge\)\(\mu\) ₂ \(\ge\) \(\mu\) ₃
• D)\(\mu\) ₁\(\le\)\(\mu\) ₂ \(\le\)\(\mu\) ₃
• E)\(\mu\) ₁ \(\le\)\(\mu\) ₂ ≥ ₃

---

Definitions:

Nominal Interest Rate

The stated rate of interest on a loan or financial investment, not adjusted for inflation.

Real Rate Of Interest

The rate of interest an investor expects to receive after allowing for inflation.

Unemployment Rate

The percentage of the labor force that is jobless and actively seeking employment, indicating the health of an economy.

Labor Force

The aggregate sum of individuals working or in pursuit of work within a nation or area.