In an experiment involving addicted cigarette smokers, each subject
was unknowingly administered either the new drug Nico-Gone or a
placebo. One year later, less than a third of the subjects who were
administered Nico-Gone had resumed smoking, compared with
about two thirds of the subjects who were administered a placebo.
These reports confirm that Nico-Gone is effective in curing addiction
to cigarette smoking.
Which of the following, if true, most strongly supports the conclusion
above?
A. One year after the experiment, the percentage of the experiment's
subjects who were cigarette smokers was less than the
percentage of the general population who were smokers.
B. Other reliable studies indicate that cigarette smokers often
falsely inform others that they are not smokers.
C. During the year following the experiment, cigarettes were
readily available to all of the subjects.
D. One year after the experiment, the total number of subjects
who were cigarette smokers was less than the number who
were smokers one year prior to the experiment.
E. During the year following the experiment, some of the subjects
received other treatment to help them avoid cigarette smoking.
OA:: [spoiler] AFTER DISCUSSION[/spoiler]
SMOKERS
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IMO (C)
A and B no effect.
C. yes! It tells that after an experiment, cigarette is all back. (like yo yo effect).
D. total number... it does not specifically state. out!
E. no effect.
A and B no effect.
C. yes! It tells that after an experiment, cigarette is all back. (like yo yo effect).
D. total number... it does not specifically state. out!
E. no effect.
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this is a special class of problem: it's about a scientific experiment.gmatmachoman wrote:In an experiment involving addicted cigarette smokers, each subject
was unknowingly administered either the new drug Nico-Gone or a
placebo. One year later, less than a third of the subjects who were
administered Nico-Gone had resumed smoking, compared with
about two thirds of the subjects who were administered a placebo.
These reports confirm that Nico-Gone is effective in curing addiction
to cigarette smoking.
Which of the following, if true, most strongly supports the conclusion
above?
A. One year after the experiment, the percentage of the experiment's
subjects who were cigarette smokers was less than the
percentage of the general population who were smokers.
B. Other reliable studies indicate that cigarette smokers often
falsely inform others that they are not smokers.
C. During the year following the experiment, cigarettes were
readily available to all of the subjects.
D. One year after the experiment, the total number of subjects
who were cigarette smokers was less than the number who
were smokers one year prior to the experiment.
E. During the year following the experiment, some of the subjects
received other treatment to help them avoid cigarette smoking.
OA:: [spoiler]:wink: AFTER DISCUSSION[/spoiler]
if you ever want to solidify the scientific connection between variable A and variable B, you should CONTROL THE OTHER VARIABLES.
this means that you should make sure that all other RELEVANT variables are THE SAME for all subjects/treatment units in the experiment.
this is what choice (c) does.
the post-trial availability of cigarettes is obviously a relevant variable (since the trials are concerned with whether the subjects resumed smoking); this choice controls that variable, as it should.
Ron has been teaching various standardized tests for 20 years.
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Pueden hacerle preguntas a Ron en castellano
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Voit esittää kysymyksiä Ron:lle myös suomeksi
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Quand on se sent bien dans un vêtement, tout peut arriver. Un bon vêtement, c'est un passeport pour le bonheur.
Yves Saint-Laurent
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OA is C
Thanks all...Cheers !!
Thanks Ron!!
Thanks all...Cheers !!
Thanks Ron!!