BSC 1005 EXAM 1 questions with 100%
complete solutions passed
When scientists carry out an experiment, they are testing a ____________.
a. theory
b. question
c. hypothesis
d. control
e. variable - correct answer ✔✔Hypothesis
Of the following, which is the earliest step in the scientific process?
A. generating a hypothesis
B. analyzing data
C. conducting an experiment
D. drawing a conclusion
E. asking a question about an observation - correct answer ✔✔Asking a question about an
observation
In a controlled experiment, which group receives a placebo?
A. the experimental group
B. the control group
C. the scientist group
D. the independent group
E. all groups - correct answer ✔✔The control group
,n the studies of coffee and memory discussed in this chapter, the independent variable is
____________ and the dependent variable is ____________.
A. caffeinated coffee; decaffeinated coffee
B. memory; caffeinated coffee
C. caffeine; memory
D. memory; caffeine
E. decaffeinated coffee; caffeinated coffee - correct answer ✔✔caffeine; memory
Can an epidemiologist who finds a correlation between the use of tanning beds and melanoma
(an aggressive form of skin cancer) in college-age women conclude that tanning beds cause skin
cancer?
A. yes, as long as the correlation was statistically significant
B. yes, but only for college-age women
C. yes, but only melanoma skin cancer, not other forms of skin cancer
D. no; the study would have to be done with a wider range of participants (males and females of
different ages) before it can be concluded that tanning beds cause melanoma
E. no; correlation is not proof of causation - correct answer ✔✔no; correlation is not proof of
causation
n which of the following would you have the most confidence?
A. a randomized clinical trial with 15,000 subjects
B. a randomized clinical trial with 5,000 subjects
C. an epidemiological study with 15,000 subjects
D. an endorsement of a product by a movie star
E. a report on a study presented by a news organization - correct answer ✔✔a randomized
clinical trial with 15,000 subjects
What is the importance of statistical analyses?
, A. They can reveal whether or not the data have been fabricated.
B. They can be used to support or reject the hypothesis.
C. They can be used to determine whether any observed differences between two groups are
real or a result of chance.
D. all of the above
E. b and c - correct answer ✔✔b and c
You hear a news report about a new asthma treatment. What would you want to know before
you asked your doctor if this treatment was right for you?
A. Was the drug tested in a randomized clinical trial?
B. How many participants were in the trial?
C. Was there a significant difference between the effect of the new drug and the treatment used
in the control group?
D. Did any of the researchers have financial ties to the manufacturer of the new asthma drug?
E. all of the above - correct answer ✔✔all of the above
You are listening to a news report that claims a new study has found convincing evidence that a
particular weight-loss product is much more effective than diet and exercise. What can you infer
about the "convincing evidence" in this case?
A. It agrees with the hypothesis.
B. Statistical tests showed significantly more weight loss in the participants who used the
weight-loss product than those who relied on diet and exercise.
C. All the participants lost at least 10 pounds.
D. Only the participants who used the weight-loss product lost weight.
E. The participants who used the weight-loss product lost an average of 3 pounds, while the
participants that used diet and exercise lost an average of 2 pounds. - correct answer ✔✔it
agrees with the hypothesis
complete solutions passed
When scientists carry out an experiment, they are testing a ____________.
a. theory
b. question
c. hypothesis
d. control
e. variable - correct answer ✔✔Hypothesis
Of the following, which is the earliest step in the scientific process?
A. generating a hypothesis
B. analyzing data
C. conducting an experiment
D. drawing a conclusion
E. asking a question about an observation - correct answer ✔✔Asking a question about an
observation
In a controlled experiment, which group receives a placebo?
A. the experimental group
B. the control group
C. the scientist group
D. the independent group
E. all groups - correct answer ✔✔The control group
,n the studies of coffee and memory discussed in this chapter, the independent variable is
____________ and the dependent variable is ____________.
A. caffeinated coffee; decaffeinated coffee
B. memory; caffeinated coffee
C. caffeine; memory
D. memory; caffeine
E. decaffeinated coffee; caffeinated coffee - correct answer ✔✔caffeine; memory
Can an epidemiologist who finds a correlation between the use of tanning beds and melanoma
(an aggressive form of skin cancer) in college-age women conclude that tanning beds cause skin
cancer?
A. yes, as long as the correlation was statistically significant
B. yes, but only for college-age women
C. yes, but only melanoma skin cancer, not other forms of skin cancer
D. no; the study would have to be done with a wider range of participants (males and females of
different ages) before it can be concluded that tanning beds cause melanoma
E. no; correlation is not proof of causation - correct answer ✔✔no; correlation is not proof of
causation
n which of the following would you have the most confidence?
A. a randomized clinical trial with 15,000 subjects
B. a randomized clinical trial with 5,000 subjects
C. an epidemiological study with 15,000 subjects
D. an endorsement of a product by a movie star
E. a report on a study presented by a news organization - correct answer ✔✔a randomized
clinical trial with 15,000 subjects
What is the importance of statistical analyses?
, A. They can reveal whether or not the data have been fabricated.
B. They can be used to support or reject the hypothesis.
C. They can be used to determine whether any observed differences between two groups are
real or a result of chance.
D. all of the above
E. b and c - correct answer ✔✔b and c
You hear a news report about a new asthma treatment. What would you want to know before
you asked your doctor if this treatment was right for you?
A. Was the drug tested in a randomized clinical trial?
B. How many participants were in the trial?
C. Was there a significant difference between the effect of the new drug and the treatment used
in the control group?
D. Did any of the researchers have financial ties to the manufacturer of the new asthma drug?
E. all of the above - correct answer ✔✔all of the above
You are listening to a news report that claims a new study has found convincing evidence that a
particular weight-loss product is much more effective than diet and exercise. What can you infer
about the "convincing evidence" in this case?
A. It agrees with the hypothesis.
B. Statistical tests showed significantly more weight loss in the participants who used the
weight-loss product than those who relied on diet and exercise.
C. All the participants lost at least 10 pounds.
D. Only the participants who used the weight-loss product lost weight.
E. The participants who used the weight-loss product lost an average of 3 pounds, while the
participants that used diet and exercise lost an average of 2 pounds. - correct answer ✔✔it
agrees with the hypothesis
