A Random Sample of 18 Observations Is Taken from a Normal

question 3

Multiple Choice

A random sample of 18 observations is taken from a normal population. The sample mean and sample standard deviation are 76.4 and 4.2, respectively. What is an 80% interval estimate of the population variance?

• A) [12.107, 29.735]
• B) [10.870, 34.581]
• C) [12.819, 31.484]
• D) [14.636, 23.443]

---

Definitions:

Elasticity Coefficient

A numerical measure of how responsive the quantity demanded or supplied of a good or service is to changes in its price or other factors.

Tax on Cigarettes

A financial charge imposed on the sale of cigarettes, often used as a public health tool to discourage smoking and to raise revenue for health initiatives.

Demand for Cigarettes

The consumer's desire and willingness to pay for cigarettes at various price levels.

Patellofemoral Disorder

A condition related to the knee, where there is pain or discomfort around the patella (kneecap) and the femur, often due to misalignment or stress.