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A researcher placed interviewers at multiple entrances and exits to a mall and asked them to interview a wide sample of mall visitors including parents, couples, and singles. In the process of verifying the responses, the researcher found that one interviewer only sampled mothers with children. The interviewer noted that only mothers with young children entered via his entrance. What kind of error has occurred here?
Presidential Election
The electoral process in which citizens of a country vote to elect the president of the nation, often through a direct vote or an electoral college system, depending on the country's constitution.
George W. Bush
The 43rd President of the United States, serving from 2001 to 2009, known for the War on Terror and the response to the September 11 attacks.
Al Gore
An American politician and environmentalist who served as the 45th Vice President of the United States from 1993 to 2001.
Computer Programming Aptitude Test
An assessment tool designed to evaluate an individual's ability to learn and understand computer programming languages and logic.
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