This Figure Shows Graphed Medical Research Results from a Study

question 53

Multiple Choice

This figure shows graphed medical research results from a study on a new vaccine. The research was done in an effort to determine if a new vaccine would be effective at preventing potentially dangerous rotavirus infections in infants. Green data bars represent occurrence of infant cases that had normal rotavirus strains that aren't critically dangerous. Blue data bars represent occurrence of infant cases that had more dangerous rotavirus strains that can hospitalize or lead to fatality of infants

-In the graph,the X-axis is showing different doses of vaccine,including "placebo," "low," "medium" and "high." These levels of vaccine were applied to different groups of babies to test if and how much the vaccination helped reduce the incidence of rotavirus,an illness that can quickly dehydrate infants to critical or fatal levels.These doses represent

• A) the independent variable in this medical study.
• B) the standardized variable in this medical study.
• C) the dependent variable in this medical study.
• D) the control group of this medical study.

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