Statistics: Concepts and Controversies 10th Edition by David S. Moore Test bank
b. variables.
c. individuals.
d. populations.
ANSWER: b
11. The population for the GSS is
a. all adult residents of the United States.
b. the University of Chicago.
c. the 1500 persons interviewed.
d. the list of questions asked.
ANSWER: a
12. The essential difference between an experiment and an observational study is that
a. observational studies always involve large numbers of subjects, but experiments never do.
b. in an experiment, information is gathered only on animals or things, but in an observational study, only information about people is gathered.
c. an observational study imposes treatments on the subjects, but an experiment does not.
d. observational studies cannot have variables.
e. an experiment imposes treatments on the subjects, but an observational study does not.
ANSWER: e
13. A Gallup Poll asked 1022 randomly chosen adults whether the failure of the government to solve major challenges facing the country was a "crisis," a "major problem," a "minor problem," or "not a problem." The proportions giving each response were 30 percent, 51 percent, 14 percent, and 4 percent, respectively (percents don't add to 100 due to rounding error). The sample for this poll is
a. all adults.
b. the 1022 respondents.
c. government workers.
d. those responding "crisis."
ANSWER: b
An editorial writer for the East Mule Shoe Gazette wants to measure public support for a discontinued construction project that has left a city-block-size hole in the middle of the East Mule Shoe downtown area, so one day he uses his lunch hour to walk down the block adjacent to the project and interviews the first 25 people who will talk to him about it.
14. The sample for this survey is
a. all residents of East Mule Shoe.
b. all newspaper readers.
c. all people downtown the day the survey was conducted.
d. the 25 people who gave the editorial writer their opinion.
e. all American adults.
ANSWER: d
15. The population for the survey is
a. all residents of East Mule Shoe.
b. all newspaper readers.
c. all people downtown the day the survey was conducted.
d. the 25 people who gave the editorial writer their opinion.
e. all American adults.
ANSWER: a
Can pleasant aromas help people work more efficiently? Researchers did this study to find out. Twenty-two students worked a paper-and-pencil maze six times. On three tries, they wore a mask with floral scents. On the other three tries, they wore a mask with no scent. The six tries were done in random order and each used a different maze. The researchers found that the subjects took less time to complete the maze when wearing the scented mask.
16. This study is a(n)
a. experiment.
b. observational study.
c. sample survey.
d. census.
e. population.
ANSWER: a
17. The population for this study is
a. 22 students.
b. masks.
c. scents.
d. people.
e. maze time.
ANSWER: d
18. The response variable for this study is
a. 22 students.
b. type of scent on mask.
c. time to complete maze.
d. order of tries.
ANSWER: c
19. A recent survey of 35,101 randomly selected U.S. adults studied the religious affiliation of Americans. The sample for this survey is
a. religious affiliation.
b. the 35,101 people questioned.
c. all adults with telephones.
d. all U.S. adults.
ANSWER: b
20. In a(n) _____________, all subjects of the population are studied.
a. census
b. experiment
c. observational study
d. sample survey
ANSWER: a
21. A(n) _____________ is a subset of subjects from the population.
a. census
b. sample
c. individual
d. population
ANSWER: b