D772 Course Material Summary Test QUESTIONS WITH
ANSWERS
What is one example of a population from a research study? -
CORRECT ANSWERS ✔✔All American women under the age of 60
A pollster selects seven random marketing firms and conducts in-
person interviews about industry trends for all employees at those
firms. What is the sampling method described in this situation? -
CORRECT ANSWERS ✔✔Cluster
Which group represents a placebo group? - CORRECT ANSWERS
✔✔In a study on heart medicine, those receiving a pill with no
medical benefit
Which study is a double-blind experiment? - CORRECT ANSWERS
✔✔Researchers studying the effect of caffeine on attention span
administer 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? -
CORRECT ANSWERS ✔✔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? -
CORRECT ANSWERS ✔✔While standing outside the local
department of motor vehicles, a researcher stops people and asks
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? -
CORRECT ANSWERS ✔✔Non-response bias
A researcher planted two maple trees in plain soil and two maple
trees in fertilized soil. Each tree was given 20 mL of water and 8
hours of sunlight each day. After four weeks, the trees in plain soil
were 7% taller than the trees in fertilized soil. Is this result likely to be
statistically significant? - CORRECT ANSWERS ✔✔No, because the
sample size for the study was too small.
A sociologist is designing a study that can be used to test a
hypothesis. What should the sociologist avoid doing to prevent
results that are potentially misleading? - CORRECT ANSWERS
✔✔Duplicating data to increase the sample size
ANSWERS
What is one example of a population from a research study? -
CORRECT ANSWERS ✔✔All American women under the age of 60
A pollster selects seven random marketing firms and conducts in-
person interviews about industry trends for all employees at those
firms. What is the sampling method described in this situation? -
CORRECT ANSWERS ✔✔Cluster
Which group represents a placebo group? - CORRECT ANSWERS
✔✔In a study on heart medicine, those receiving a pill with no
medical benefit
Which study is a double-blind experiment? - CORRECT ANSWERS
✔✔Researchers studying the effect of caffeine on attention span
administer 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? -
CORRECT ANSWERS ✔✔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? -
CORRECT ANSWERS ✔✔While standing outside the local
department of motor vehicles, a researcher stops people and asks
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? -
CORRECT ANSWERS ✔✔Non-response bias
A researcher planted two maple trees in plain soil and two maple
trees in fertilized soil. Each tree was given 20 mL of water and 8
hours of sunlight each day. After four weeks, the trees in plain soil
were 7% taller than the trees in fertilized soil. Is this result likely to be
statistically significant? - CORRECT ANSWERS ✔✔No, because the
sample size for the study was too small.
A sociologist is designing a study that can be used to test a
hypothesis. What should the sociologist avoid doing to prevent
results that are potentially misleading? - CORRECT ANSWERS
✔✔Duplicating data to increase the sample size
