Page 1 of 155
BRM FINAL EXAM AND MIDTERM EXAM TESTBANK COMPLETE
400 QUESTIONS AND VERIFIED SOLUTIONS LATEST UPDATE
THIS YEAR
QUESTION: You want to take an SRS of 50 of the 816 students who live in a college dormitory.
You label the students 001 to 816 in alphabetical order.
Another valid choice of labels for the 816 students is
a) 000 to 816 in alphabetical order
b) 001 to 816 in order of the student ID numbers
c) 000 to 815 in alphabetical order
d) Both B and C are correct
e) Answers A, B, and C are correct - ANSWER-d) Both B and C are correct
QUESTION: If a sampling method has too much bias, then
a) we need to improve the sampling method to decrease the bias
b) we need to increase the sample size to decrease the bias.
c) we should sample from a larger population to decrease the bias.
d) none of the above will help decrease the bias of a sampling method. - ANSWER-a) we need
to improve the sampling method to decrease the bias
, Page 2 of 155
QUESTION: For a class project, you want to survey students at your school for their opinions
about the importance of studying. You go to the campus library and survey 200 students as
they are leaving the library.What type of sampling was used in this situation?
a) This is a simple random sample
b) This is a convenience sample
c) This is a voluntary response sample
d) This is a census - ANSWER-b) This is a convenience sample
QUESTION: For a class project, you want to survey students at your school for their opinions
about the importance of studying. You go to the campus library and survey 200 students as
they are leaving the library. In this situation, your survey results will
a) be exact because the information came from a census
b) likely be biased because, typically, only people with strong opinions will participate
c) likely be biased because most students leaving the library were there to study
d) be very accurate because the information came from an SRS - ANSWER-c) likely be biased
because most students leaving the library were there to study
, Page 3 of 155
QUESTION: The report of the SAT study says, "With 95 percent confidence, one can say that
students who are coached raise their average SAT scores by between 28 and 57 points more
than students who are not coached."
By "95 percent confidence," the report means that
a) 95% of all students will increase their score by between 28 and 57 points if they are coached
b) the average increase is between 28 and 57 points
c) the study obtained the 28 to 57 point range by using a method that would give a correct
answer in 95% of all samples
d) 95% of all adults would believe the statement - ANSWER-c) the study obtained the 28 to 57
point range by using a method that would give a correct answer in 95% of all samples
QUESTION: The report of the SAT study says, "With 95 percent confidence, one can say that
students who are coached raise their average SAT scores by between 28 and 57 points more
than students who are not coached."The study is 95% confident that the difference between
average scores for coached and uncoached students is between 28 and 57 points. To be 99%
confident, the range of points would be:
a) wider because higher confidence requires a larger margin of error
b) narrower because higher confidence requires a smaller margin of error
c) wider because higher confidence requires a smaller margin of error
, Page 4 of 155
d) narrower because higher confidence requires a larger margin of error - ANSWER-a) wider
because higher confidence requires a larger margin of error
QUESTION: To reduce the variability of estimates from a simple random sample, one should
a) use a smaller sample
b) increase the bias
c) use a count, not a percent
d) use a larger sample
e) use a percent, not a count - ANSWER-d) use a larger sample
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 (percentages 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) the 1022 respondents
BRM FINAL EXAM AND MIDTERM EXAM TESTBANK COMPLETE
400 QUESTIONS AND VERIFIED SOLUTIONS LATEST UPDATE
THIS YEAR
QUESTION: You want to take an SRS of 50 of the 816 students who live in a college dormitory.
You label the students 001 to 816 in alphabetical order.
Another valid choice of labels for the 816 students is
a) 000 to 816 in alphabetical order
b) 001 to 816 in order of the student ID numbers
c) 000 to 815 in alphabetical order
d) Both B and C are correct
e) Answers A, B, and C are correct - ANSWER-d) Both B and C are correct
QUESTION: If a sampling method has too much bias, then
a) we need to improve the sampling method to decrease the bias
b) we need to increase the sample size to decrease the bias.
c) we should sample from a larger population to decrease the bias.
d) none of the above will help decrease the bias of a sampling method. - ANSWER-a) we need
to improve the sampling method to decrease the bias
, Page 2 of 155
QUESTION: For a class project, you want to survey students at your school for their opinions
about the importance of studying. You go to the campus library and survey 200 students as
they are leaving the library.What type of sampling was used in this situation?
a) This is a simple random sample
b) This is a convenience sample
c) This is a voluntary response sample
d) This is a census - ANSWER-b) This is a convenience sample
QUESTION: For a class project, you want to survey students at your school for their opinions
about the importance of studying. You go to the campus library and survey 200 students as
they are leaving the library. In this situation, your survey results will
a) be exact because the information came from a census
b) likely be biased because, typically, only people with strong opinions will participate
c) likely be biased because most students leaving the library were there to study
d) be very accurate because the information came from an SRS - ANSWER-c) likely be biased
because most students leaving the library were there to study
, Page 3 of 155
QUESTION: The report of the SAT study says, "With 95 percent confidence, one can say that
students who are coached raise their average SAT scores by between 28 and 57 points more
than students who are not coached."
By "95 percent confidence," the report means that
a) 95% of all students will increase their score by between 28 and 57 points if they are coached
b) the average increase is between 28 and 57 points
c) the study obtained the 28 to 57 point range by using a method that would give a correct
answer in 95% of all samples
d) 95% of all adults would believe the statement - ANSWER-c) the study obtained the 28 to 57
point range by using a method that would give a correct answer in 95% of all samples
QUESTION: The report of the SAT study says, "With 95 percent confidence, one can say that
students who are coached raise their average SAT scores by between 28 and 57 points more
than students who are not coached."The study is 95% confident that the difference between
average scores for coached and uncoached students is between 28 and 57 points. To be 99%
confident, the range of points would be:
a) wider because higher confidence requires a larger margin of error
b) narrower because higher confidence requires a smaller margin of error
c) wider because higher confidence requires a smaller margin of error
, Page 4 of 155
d) narrower because higher confidence requires a larger margin of error - ANSWER-a) wider
because higher confidence requires a larger margin of error
QUESTION: To reduce the variability of estimates from a simple random sample, one should
a) use a smaller sample
b) increase the bias
c) use a count, not a percent
d) use a larger sample
e) use a percent, not a count - ANSWER-d) use a larger sample
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 (percentages 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) the 1022 respondents
