A Study Is Going to Be Conducted in Which a Population

question 90

Multiple Choice

A study is going to be conducted in which a population mean will be estimated using a 92% confidence interval.The estimate needs to be within 12 of the actual population mean.The population variance is estimated to be around 2500.The necessary sample size should be at least _______.

• A)15
• B)47
• C)54
• D)638
• E)700

---

Definitions:

Nonexcludable Problem

An issue characteristic of public goods, where it is not possible to prevent individuals who do not pay from consuming a good or service.

Optimal Level

The most favorable or efficient level of output or activity under given conditions, maximizing benefits or minimizing costs.

Public Good

A good that is non-excludable and non-rivalrous, meaning it can be used by everyone and one person's use does not diminish another's.

Free-rider Problem

A situation where individuals consume a good without contributing to its cost, typically in the context of public goods.