500 câu trắc nghiệm Kinh tế lượng – 1A

SHORT ANSWER.

Write the word or phrase that best completes each statement or answers the question.

Identify the sample and population. Also, determine whether the sample is likely to be representative of the population.

6) In a poll of 50,000 randomly selected college students, 74% answered “yes” when asked “Do you have a television in your dorm room?”.

Sample: the 50,000 selected college students; population: all college students; representative

Use critical thinking to develop an alternative conclusion.
7) A study shows that adults who work at their desk all day weigh more than those who do not.
Conclusion: Desk jobs cause people to gain weight.

Desk job workers are confined to their chairs for most of their work day. Other jobs require standing or walking around which burns calories. It is probably the lack of exercise that causes higher weights, not the desk job itself. Avoid causality altogether by saying lack of walking and exercise is associated with higher weights.

Use critical thinking to address the key issue.

8) A questionnaire is sent to 10,000 persons. 5,000 responded to the questionnaire. 3,000 of the respondents say that they “love chocolate ice cream”. We conclude that 60% of people love chocolate ice cream. What is wrong with this survey?

This is not a random sample. The survey is based on voluntary, self-selected responses and therefore has serious potential for bias.

9) A researcher wished to gauge public opinion on gun control. He randomly selected 1000 people from among registered voters and asked them the following question: “Do you believe that gun control laws which restrict the ability of Americans to protect their families should be eliminated?”. Identify the abuse of statistics and suggest a way the researcher’s methods could be improved.

The question is loaded. A more neutral way to phrase the question would be, for example, “Do you believe that gun control laws should be strengthened, weakened, or left in their current form?”.

MULTIPLE CHOICE.

Choose the one alternative that best completes the statement or answers the question. Perform the requested conversions. Round decimals to the nearest thousandth and percents to the nearest tenth of a percent, if necessary.

10) Convert 0.34 to an equivalent fraction and percent.

○ 8/25, 34%
○ 8/25, 3.4%
○ 17/50, 3.4%
● 17/50, 34%

Solve the problem.

11) A gardener has 28 clients, 25% of whom are businesses. Find the number of business clients.
○ 7000 clients
○ 700 clients
● 7 clients
○ 70 clients

Is the study experimental or observational?

12) A marketing firm does a survey to find out how many people use a product. Of the one hundred people contacted, fifteen said they use the product.
○ Experimental
● Observational

13) A clinic gives a drug to a group of ten patients and a placebo to another group of ten patients to find out if the drug has an effect on the patients’ illness.
○ Observational
● Experimental