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Evaluate Sample Size and Population Match
Grade Level
GRE
106 Evaluate Sample Size and Population Match
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An engineering lab tests a voice-recognition tool on 20 high-end phones and finds low error rates. The company claims the tool will work well on consumer devices generally. Which conclusion is best supported?
A
The sample is invalid because 20 phones is always too many for a lab test.
B
The claim is secure because high-end phones are consumer devices.
C
The test supports performance on high-end phones but not necessarily on the full range of consumer devices.
D
The tool must fail on lower-end phones because those phones were not tested, without any additional control or comparison.
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