ALLIED MAT130 MODULE 1 check your understanding

ALLIED MAT130 MODULE 1 check your understanding

Subject: Mathematics    / Statistics   
Question

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. The subjects in which college students major.

a. Ratio

b. Nominal

c. Ordinal

d. Interval

.

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2. Identify the type of observational study (cross-sectional, retrospective, prospective). The Nielsen Media Research Company uses people meters to record the viewing habits of about 5000 households, and today those meters will be used to determine the proportion of households tuned to CBS Evening News.

a. Cross-sectional

b. Prospective

c. Retrospective

d. None of the choices apply

3. Identify the type of observational study (cross-sectional, retrospective, prospective). A town obtains current employment data by polling 10,000 of its citizens this month.

a. Cross-sectional

b. Prospective

c. Retrospective

d. None of the choices apply

4. Determine what completes the following definition: A parameter is a numerical measurement describing some characteristic of a:

a. sample.

b. person.

c. population.

d. statistic.

5. Identify the type of observational study (cross-sectional, retrospective, prospective). University of Toronto researchers studied 699 traffic crashes involving drivers with cell phones (based on data from "Association Between Cellular-Telephone Calls and Motor Vehicle Collisions," by Redelmeier and Tibshirani, New England Journal of Medicine, Vol. 336, No. 7). They found that cell phone use quadruples the risk of a collision.

a. Cross-sectional

b. Prospective

c. Retrospective

d. None of the choices apply

6. Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. Survey responses of "good, better, best".

a. Ratio

b. Nominal

c. Interval

d. Ordinal

7. Identify which of these types of sampling is used: random, stratified, systematic, cluster, convenience. In a study of college programs, 820 students are randomly selected from those majoring in communications, 1463 students are randomly selected from those majoring in business, and 760 students are randomly selected from those majoring in history.

a. Convenience

b. Random

c. Systematic

d. Cluster

e. Stratified

8. Identify whether the sampling plan results in a random sample, simple random sample, or neither. NBC News polled reactions to the last presidential election by surveying adults who were approached by a reporter at a location in New York City.

a. Random sample

b. Simple random sample

c. Neither

9. Use common sense to determine whether the given event is impossible; possible, but very unlikely; or possible and likely. Andre flipped a coin twice and it came up the same way both times.

a. Impossible

b. Possible, but very unlikely

c. Possible and likely

10. Identify which of these types of sampling is used: random, stratified, systematic, cluster, convenience. A pollster uses a computer to generate 500 random numbers, then interviews the voters corresponding to those numbers.

a. Convenience

b. Random

c. Systematic

d. Cluster

e. Stratified

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11. Solve the problem. Convert 83% to an equivalent decimal.

a. 83.0

b. 8.3

c. 0.83

d. 1.83

e. .0083

12. Solve the problem. On a test, 95% of the questions are answered correctly. If 57 questions are correct, how many questions are on the test?

a. 167

b. 95

c. 19

d. 60

13. Determine whether the given value is a statistic or a parameter. The author randomly selected 35 movies and found the amount of money that they grossed from ticket sales. The average (mean) is $123.7 million.

a. Statistic

b. Parameter

14. Identify which of these types of sampling is used: random, stratified, systematic, cluster, convenience. The U.S. Department of Corrections collects data about returning prisoners by randomly selecting five federal prisons and surveying all of the prisoners in each of the prisons.

a. Convenience

b. Random

c. Systematic

d. Cluster

e. Stratified

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15. Identify whether the sampling plan results in a random sample, simple random sample, or neither. ABC News conducts an election day poll by randomly selecting voting precincts in New York, then interviewing all voters as they leave those precincts.

a. Random sample

b. Simple random sample

c. Neither