A study at Yale Medical School investigated treatments for chronic cocaine abusers. Of the 72 subjects, all cocaine users who wanted to quit, 24 were assigned at random to each of three medications: (a) desipramine, (b) lithium, (c) a placebo. After six weeks the subjects reported whether they had stayed off cocaine. The explanatory variable in the Yale study is: a) randomization
A study at Yale Medical School investigated treatments for chronic cocaine abusers. Of the 72 subjects, all cocaine users who wanted to quit, 24 were assigned at random to each of three medications: (a) desipramine, (b) lithium, (c) a placebo. After six weeks the subjects reported whether they had stayed off cocaine. The explanatory variable in the Yale study is: a) randomization
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
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A study at Yale Medical School investigated treatments for chronic cocaine abusers. Of the 72 subjects, all cocaine users who wanted to quit, 24 were assigned at random to each of three medications: (a) desipramine, (b) lithium, (c) a placebo. After six weeks the subjects reported whether they had stayed off cocaine. The explanatory variable in the Yale study is:
a) randomization.
b) 72 cocaine users.
c) which medication a subject was given.
d) whether or not a subject stayed off cocaine.
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A study at Yale Medical School investigated treatments for chronic cocaine abusers. Of the 72 subjects, all cocaine users who wanted to quit, 24 were assigned at random to each of three medications: (a) desipramine, (b) lithium, (c) a placebo. After six weeks the subjects reported whether they had stayed off cocaine. The explanatory variable in the Yale study is:
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