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Analyzing Multiple Variables or Series
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PSAT Prep
RW.053 Analyzing Multiple Variables or Series
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A fitness study compared average reaction time for athletes and nonathletes after different sleep amounts. The graph shows reaction time in milliseconds. Which choice best describes the relationship among sleep, group, and reaction time?
A
Athletes were faster only after 10 hours of sleep.
B
Reaction time increased as sleep increased for both groups, and nonathletes had faster times at every amount.
C
Reaction time decreased as sleep increased for both groups, and athletes had faster reaction times at every sleep amount.
D
Nonathletes and athletes had equal reaction times after 8 hours of sleep.
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