Question 1

A middle school student passes out leaflets to the adults at a school function. The leafletsask the recipient to indicate whether they believe in anthropogenic global warming. The bottom of the leaflet indicates that the completed leaflet should be returned to the student. Identify the kind of sample that is being used.

Accepted Answer

A)  cluster sample
B)  systematic sample
C)  sample of convenience
D)  stratified sample

Question 2

Which of the following is the best description of a randomized experiment?

Accepted Answer

A)  an experiment in which the outcomes are random
B)  an experiment in which the investigators are chosen at random
C)  an experiment in which the experimental units are selected at random
D)  an experiment in which the treatments are assigned randomly to experimental units

Question 3

The question..."Do you favor a higher standard of living, even though it produces unclean air and water?"... is an example of ...

Accepted Answer

A)  random sampling
B)  framing
C)  leading question bias
D)  sampling bias

Question 4

A pollster randomly samples 159 Democrats, 151 Republicans and 16 Independents (allregistered voters) in Metro City and asks each poll participant which mayorial candidatehe or she prefers. Identify the kind of sample that the pollster is using.

Accepted Answer

A)  sample of convenience
B)  stratified sample
C)  voluntary response sample
D)  cluster sample

Question 5

Which of the following sample types should you always regard as unreliable?

Accepted Answer

A)  simple random samples
B)  cluster samples
C)  stratified samples
D)  voluntary response samples

Question 6

Which of the following is the best description of a double-blind experiment?

Accepted Answer

A)  an experiment in which neither the investigators nor the subjects know how the treatments have been assigned
B)  an experiment in which the subjects are blindfolded so they cannot see which treatment is applied to them
C)  an experiment in which neither the investigators nor the subjects know the others' names
D)  an experiment in which both the investigators and the subjects are hidden from the others' views

Question 7

In a randomized experiment, if there are large differences in outcomes among the treatment groups, we can conclude that the differences are due to_____________________.

Accepted Answer

A)  deliberate data manipulation
B)  experimental error
C)  random luck
D)  the treatments

Question 8

The names of all 130 students in a professor's class are written on identical slips of paper, and the slips are placed into a large glass jar. Then, the professor selects 5 random slips from the jar. Identify the kind of sample that is being used.

Accepted Answer

A)  simple random sample
B)  systematic sample
C)  cluster sample
D)  sample of convenience

Question 9

When experimental units are people, they are sometimes called ________________.

Accepted Answer

A)  human units
B)  personnel
C)  subjects
D)  topics

Question 10

Determine which of the following describes nominal data.
i. My favorite days of the week are Friday, Saturday, and Tuesday.
ii. My favorite day of the week is Friday, my second-favorite is Saturday, andthird-favorite is Tuesday.

Accepted Answer

A)  i only
B)  ii only
C)  neither i nor ii
D)  both i and ii

Question 11

In an experiment, subjects are put into two categories according to sex, and then each subject is randomly assigned a treatment . This is an example of...

Accepted Answer

A)  gender bias
B)  randomized blocking
C)  confounding
D)  observational studies

Question 12

Which one of the following data are continuous?

Accepted Answer

A)  the average height of a sample of trees
B)  the rankings of the trees, from most numerous to least numerous
C)  the number of representatives of each species in the park
D)  the number of species of trees in a park

Exam 1: Basic Ideas

Determine which of the following describes nominal data. i. My favorite days of the week are Friday, Saturday, and Tuesday. ii. My favorite day of the week is Friday, my second-favorite is Saturday, andthird-favorite is Tuesday.

Correct Answer
verified

Which of the following sample types should you always regard as unreliable?

Correct Answer
verified

When experimental units are people, they are sometimes called ________________.

Correct Answer
verified

In an experiment, subjects are put into two categories according to sex, and then each subject is randomly assigned a treatment . This is an example of...

Correct Answer
verified

A pollster randomly samples 159 Democrats, 151 Republicans and 16 Independents (allregistered voters) in Metro City and asks each poll participant which mayorial candidatehe or she prefers. Identify the kind of sample that the pollster is using.

Correct Answer
verified

The names of all 130 students in a professor's class are written on identical slips of paper, and the slips are placed into a large glass jar. Then, the professor selects 5 random slips from the jar. Identify the kind of sample that is being used.

Correct Answer
verified

The question..."Do you favor a higher standard of living, even though it produces unclean air and water?"... is an example of ...

Correct Answer
verified

Which of the following is the best description of a double-blind experiment?

Correct Answer
verified

Correct Answer
verified

Which of the following is the best description of a randomized experiment?

Correct Answer
verified

Which one of the following data are continuous?

Correct Answer
verified

In a randomized experiment, if there are large differences in outcomes among the treatment groups, we can conclude that the differences are due to_____________________.

Correct Answer
verified

Exam 1: Basic Ideas

Determine which of the following describes nominal data. i. My favorite days of the week are Friday, Saturday, and Tuesday. ii. My favorite day of the week is Friday, my second-favorite is Saturday, andthird-favorite is Tuesday.

Correct AnswerverifiedShow Answer

Which of the following sample types should you always regard as unreliable?

Correct AnswerverifiedShow Answer

When experimental units are people, they are sometimes called ________________.

Correct AnswerverifiedShow Answer

In an experiment, subjects are put into two categories according to sex, and then each subject is randomly assigned a treatment . This is an example of...

Correct AnswerverifiedShow Answer

A pollster randomly samples 159 Democrats, 151 Republicans and 16 Independents (allregistered voters) in Metro City and asks each poll participant which mayorial candidatehe or she prefers. Identify the kind of sample that the pollster is using.

Correct AnswerverifiedShow Answer

The names of all 130 students in a professor's class are written on identical slips of paper, and the slips are placed into a large glass jar. Then, the professor selects 5 random slips from the jar. Identify the kind of sample that is being used.

Correct AnswerverifiedShow Answer

The question..."Do you favor a higher standard of living, even though it produces unclean air and water?"... is an example of ...

Correct AnswerverifiedShow Answer

Which of the following is the best description of a double-blind experiment?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following is the best description of a randomized experiment?

Correct AnswerverifiedShow Answer

Which one of the following data are continuous?

Correct AnswerverifiedShow Answer

In a randomized experiment, if there are large differences in outcomes among the treatment groups, we can conclude that the differences are due to_____________________.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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