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Evaluate Sample Size and Practical Precision
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DSST
DSSTSTAT.038 Evaluate Sample Size and Practical Precision
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A researcher asks whether doubling a random sample from 500 to 1,000 will cut the standard error in half. Which answer is correct?
A
No; increasing n usually increases standard error.
B
Yes; standard error is always exactly inversely proportional to n.
C
Yes; doubling n eliminates both bias and sampling variability.
D
No; doubling n divides standard error by square root of 2, not 2.
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