Practice prompt · Q:statistics-estimation-and-uncertainty/nonsampling-error-001

Identify what a larger random sample cannot repair

Separate sampling precision from source, cutoff, classification, and processing controls.

Updated Aug 7, 2026 Review due Nov 7, 2026

Practice

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Choose a response, then check the answer and explanation.

Assessment-specific hypothetical: Juniper can afford to quadruple its random sample, but the frame still excludes invoices posted late and the final-payment field sometimes contains the first-payment date. Which response addresses the actual failure modes?

Sampling error and nonsampling error can coexist. The corrective action must match the failure mechanism.

Choose the best answer. a Quadrupling the sample fixes both problems because standard error falls. b Reconcile late postings into the frame and validate the final-payment definition; treat sample-size precision separately. c Add the margin of error to every wrong date to absorb the measurement problem. d Delete every late-posted invoice because late posting proves it is outside the target.

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Answer: b

Choice b. Repair or qualify coverage and measurement through source evidence. Only then consider how additional randomly selected units change sampling precision.