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Chandler polled the first 9797 runners to finish a marathon.\newlineIs this a random sample of the runners?\newlineChoices:\newline(A)yes\newline(B)no

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Identify representative, random, and biased samplesright chevron icon

Full solution

Q. Chandler polled the first 9797 runners to finish a marathon.\newlineIs this a random sample of the runners?\newlineChoices:\newline(A)yes\newline(B)no
  1. Understand the problem: Step 11: Understand the problem.\newlineChandler polled the first 9797 runners to finish a marathon. We need to determine if this is a random sample of all the runners.
  2. Define a random sample: Step 22: Define a random sample.\newlineA random sample means every member of the population has an equal chance of being selected. Since Chandler only polled the first 9797 runners, these runners are not randomly chosen from all participants but are specifically the first to finish.
  3. Compare sampling method: Step 33: Compare the sampling method to the definition of a random sample. Polling only the first 9797 finishers introduces bias towards faster runners, and does not give all runners an equal chance to be included in the sample.

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