D772 STUDY GUIDE EXAMS SET TEST PAPER
QUESTIONS AND SOLUTIONS 2026 VIEW
AHEAD EXAM.
⩥ A pollster selects seven random marketing firms and conduct in
person interviews about industry trends for all employees at those
firms.
What is the sampling method described in the situation? Answer:
Cluster
⩥ Which group represents a placebo group? Answer: In a study on
heart medicine, those receiving a pill with no medical benefit
⩥ Which study is a double blind experiment Answer: Researchers
studying the effect of caffeine on attention span administered caffeine
filled pills and placebo pills to participants randomly assigned to each
group. The pills are coded so that neither the patient nor the person
administering the pill knows which kind it is.
⩥ Which implication follows from using a non-representative sample
Answer: The sample produces data that is not similar to what would
be obtained from the entire population
⩥ Which example illustrates a potential convenience, sampling bias
Answer: While standing outside the local department of motor
, vehicles, a researcher stops people and ask them to fill out a survey
about local entertainment options
⩥ A survey given to teenagers about their driving habits, had a low
return rate because many young drivers did not want to answer
questions about this topic.
What is illustrated in this scenario? Answer: Non-response bias
⩥ A researcher planted two maple trees and plain soil and two maple
trees and fertilize soil. Each tree was given 20 ML of water and eight
hours of sunlight each day. After four weeks, the trees and plain soil
were 7% taller than the trees and fertilize soil.
Is this result likely to be statistically significant? Answer: No, because
the sample size for the study was too small
⩥ As sociologist is designing a study that can be used to test a
hypothesis.
What should sociologist avoid doing to prevent results that are
potentially misleading? Answer: Duplicating data to increase the
sample size
⩥ A company randomly chose 1000 customers for an experiment. For
half of the customers, the company sent out regular marketing emails.
For the other half, the company sent physical flyers. At the conclusion
of the study, it was found that the customers who received physical
flyers made more purchases than those who receive regular emails.
Which conclusion is valid? Answer: There is a casual relationship
between the measured variables
QUESTIONS AND SOLUTIONS 2026 VIEW
AHEAD EXAM.
⩥ A pollster selects seven random marketing firms and conduct in
person interviews about industry trends for all employees at those
firms.
What is the sampling method described in the situation? Answer:
Cluster
⩥ Which group represents a placebo group? Answer: In a study on
heart medicine, those receiving a pill with no medical benefit
⩥ Which study is a double blind experiment Answer: Researchers
studying the effect of caffeine on attention span administered caffeine
filled pills and placebo pills to participants randomly assigned to each
group. The pills are coded so that neither the patient nor the person
administering the pill knows which kind it is.
⩥ Which implication follows from using a non-representative sample
Answer: The sample produces data that is not similar to what would
be obtained from the entire population
⩥ Which example illustrates a potential convenience, sampling bias
Answer: While standing outside the local department of motor
, vehicles, a researcher stops people and ask them to fill out a survey
about local entertainment options
⩥ A survey given to teenagers about their driving habits, had a low
return rate because many young drivers did not want to answer
questions about this topic.
What is illustrated in this scenario? Answer: Non-response bias
⩥ A researcher planted two maple trees and plain soil and two maple
trees and fertilize soil. Each tree was given 20 ML of water and eight
hours of sunlight each day. After four weeks, the trees and plain soil
were 7% taller than the trees and fertilize soil.
Is this result likely to be statistically significant? Answer: No, because
the sample size for the study was too small
⩥ As sociologist is designing a study that can be used to test a
hypothesis.
What should sociologist avoid doing to prevent results that are
potentially misleading? Answer: Duplicating data to increase the
sample size
⩥ A company randomly chose 1000 customers for an experiment. For
half of the customers, the company sent out regular marketing emails.
For the other half, the company sent physical flyers. At the conclusion
of the study, it was found that the customers who received physical
flyers made more purchases than those who receive regular emails.
Which conclusion is valid? Answer: There is a casual relationship
between the measured variables
