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To study congestion in the North Park subdivision, a surveyor measured traffic volumes (daily for 2 weeks) at the corner of Williams Parkway and North

To study congestion in the North Park subdivision, a surveyor measured traffic volumes (daily for 2 weeks) at the corner of Williams Parkway and North Park Drive between 1 PM and 4 PM. Are their results valid? Justify your answer. If it's not representative, suggest some changes to their approach that could alleviate some of the bias.

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