Use the Following Information to Answer the Question

question 49

Multiple Choice

Use the following information to answer the question. Can stretching help you stay alert in class? Thirty- six subjects were measured for alertness at the beginning of class; the subjects then participated in some light arm and neck stretches followed by a forty- five minute lecture. Each subject was then measured for alertness at the end of the lecture. The hypothesis test results for the sign test are summarized below. Assume that all conditions for testing have been met:

-Using a significance level of 5%, state the correct decision regarding the null hypothesis and the concluding statement.

• A)Reject H0. There is evidence to suggest that there is no difference in alertness after light arm and neck stretches before the lecture.
• B)Reject H0. There is evidence to suggest that there is difference in alertness after light arm and neck stretches before the lecture.
• C)Fail to reject H0. There is evidence to suggest that there is no difference in alertness after light arm and neck stretches before the lecture.
• D)Fail to reject H0. There is evidence to suggest that there is a difference in alertness after light arm and neck stretches before the lecture.

---

Definitions:

External Cost

Costs that a producer or consumer inflicts on a third party who is not involved in the production or consumption of the goods or services.

Economic Efficiency

A situation in which all resources in an economy are optimally distributed to serve each individual or entity in the best way while minimizing waste and inefficiency.

Competitive Market

A competitive market is a market structure characterized by a large number of buyers and sellers, where no single entity has the power to influence market prices significantly.

Free-rider Problem

A situation where individuals benefit from resources, goods, or services that they do not pay for, which can lead to underproduction or depletion of those resources.