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25 May, 00:28

A pollster was assigned to stand in the mall at entrance A and approach every 100th person coming into the mall to ask a few questions on a survey for the mall management. While counting the people who passed by, he ignored everyone who had blond hair. Identify the one piece of information that might be a source of bias.

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  1. 25 May, 01:08
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    The ignoring of blond-haired people is a bias.
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