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Data That Illustrates Variation
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SAT Prep
RW-060 Data That Illustrates Variation
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A device lab claims that touch-screen accuracy varied more among stylus tips when the screen was oily. The accompanying data display presents the relevant results. Which choice gives the strongest quantitative evidence for the claim?
A
In oily screen, values ranged from 59 percent for mesh to 84 percent for plastic disc, a spread of 25 percentage points.
B
mesh changed from 91 percent in clean screen to 59 percent in oily screen, as the visual evidence for this specific claim indicates.
C
The average value in oily screen was about 71.5 percent, based on the labeled categories and values in the display.
D
In clean screen, rubber dome and plastic disc were close, at 93 percent and 94 percent, according to the values shown in the accompanying data display
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