STP 231 Exam 1 Study questions and
answers graded A+
It is flawed because it is a voluntary response sample. - correct answer ✔✔Determine whether
the sampling method described below appears to be sound or is flawed.
In a survey of 628 subjects, the following question was posted on a newspaper's website: "In
your view, are nuclear plants safe?" The survey subjects were Internet users who chose to
respond to the question posted on the electronic edition of the newspaper.
What is 47% of 3167 adults?
1488.491
adults
b. Could the result from part (a) be the actual number of survey subjects who have at least one
chronic condition?
No, the result from part (a) could not be the actual number of survey subjects because a count
of people must result in a whole number.
Your answer is correct.
c. What is the actual number of survey subjects who have at least one chronic condition?
A possible value for the actual number of survey subjects is 1489 adults.
d. Among those surveyed, 1481 were called by landline and 1686 were called by cell phone.
What percentage of the survey subjects were called by landline?
46.8% - correct answer ✔✔In a survey of
3167
, randomly selected U.S. adults,
47%
reported that they have at least one chronic health condition, such as diabetes or high blood
pressure. Complete parts (a) through (d) below.
Quiz scores from a college level statistics course are analyzed to determine student progress. -
correct answer ✔✔Which of the following is NOT a voluntary response sample?
Question content area bottom
Part 1
Choose the correct answer below.
A.
Quiz scores from a college level statistics course are analyzed to determine student progress.
Your answer is correct.
B.
A radio station asks for call-in responses to a question concerning city recycling.
C.
A survey is taken at a mall by asking passersby if they will fill out the survey.
D.
A local dentist asks her patients to fill out a questionnaire and mail it back to determine the
quality of the care received during an office visit.
sampling method - correct answer ✔✔Fill in the blank.
If we are collecting sample data for a study, the _______ that we choose can greatly influence
the validity of our conclusions. For example, we can use sound statistical methods to analyze
data in voluntary response samples, but the results are not necessarily valid.
The study is
an observational study,
answers graded A+
It is flawed because it is a voluntary response sample. - correct answer ✔✔Determine whether
the sampling method described below appears to be sound or is flawed.
In a survey of 628 subjects, the following question was posted on a newspaper's website: "In
your view, are nuclear plants safe?" The survey subjects were Internet users who chose to
respond to the question posted on the electronic edition of the newspaper.
What is 47% of 3167 adults?
1488.491
adults
b. Could the result from part (a) be the actual number of survey subjects who have at least one
chronic condition?
No, the result from part (a) could not be the actual number of survey subjects because a count
of people must result in a whole number.
Your answer is correct.
c. What is the actual number of survey subjects who have at least one chronic condition?
A possible value for the actual number of survey subjects is 1489 adults.
d. Among those surveyed, 1481 were called by landline and 1686 were called by cell phone.
What percentage of the survey subjects were called by landline?
46.8% - correct answer ✔✔In a survey of
3167
, randomly selected U.S. adults,
47%
reported that they have at least one chronic health condition, such as diabetes or high blood
pressure. Complete parts (a) through (d) below.
Quiz scores from a college level statistics course are analyzed to determine student progress. -
correct answer ✔✔Which of the following is NOT a voluntary response sample?
Question content area bottom
Part 1
Choose the correct answer below.
A.
Quiz scores from a college level statistics course are analyzed to determine student progress.
Your answer is correct.
B.
A radio station asks for call-in responses to a question concerning city recycling.
C.
A survey is taken at a mall by asking passersby if they will fill out the survey.
D.
A local dentist asks her patients to fill out a questionnaire and mail it back to determine the
quality of the care received during an office visit.
sampling method - correct answer ✔✔Fill in the blank.
If we are collecting sample data for a study, the _______ that we choose can greatly influence
the validity of our conclusions. For example, we can use sound statistical methods to analyze
data in voluntary response samples, but the results are not necessarily valid.
The study is
an observational study,
