Information and IdeasMediumChoosing data that support a claim about a rate
Information and Ideas practice question
Two villages counted the cars passing through in one hour at 8 a.m. and again after a speed camera was installed in one of them.
Village | Before | After
Ashby (camera) | 640 | 410
Brook (no camera) | 580 | 560
The parish council argues that the camera diverted traffic away from Ashby, noting that ____
Which choice most effectively uses data from the table to complete the statement?
- A. Ashby's count fell from 640 to 410 while Brook's, with no camera, was almost unchanged.Correct
- B. Brook's count fell from 580 to 560.
- C. Ashby had 640 cars before.
- D. both villages had fewer cars afterwards.
Answer: A. Ashby's count fell from 640 to 410 while Brook's, with no camera, was almost unchanged.
A large fall with the camera; near-none without.
Why the other answers are wrong
- B. Brook's count fell from 580 to 560.
- The control village's tiny change alone shows nothing about Ashby.
- C. Ashby had 640 cars before.
- One figure.
- D. both villages had fewer cars afterwards.
- True, but hides the contrast.
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